Genetics and Heredity - Middle School Life Science
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A novel disease begins to infect individuals in a population. Is the population more likely to survive if it is genetically diverse or if the population has a similar genetic makeup?
A novel disease begins to infect individuals in a population. Is the population more likely to survive if it is genetically diverse or if the population has a similar genetic makeup?
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Why is genetic variation important to a population?
Why is genetic variation important to a population?
The answer is "it allows a population to adapt in response to changing environments."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "it allows a population to adapt in response to changing environments."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Which of these processes is most important for genetic variation?
Which of these processes is most important for genetic variation?
The answer is meiosis because that is where "crossover" and recombination of DNA take place in sexual reproduction, increasing genetic variation of offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is meiosis because that is where "crossover" and recombination of DNA take place in sexual reproduction, increasing genetic variation of offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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According to this diagram, what will increase genetic variation most?
According to this diagram, what will increase genetic variation most?
The answer is "crossing over" because it will produce 4 genetically different offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "crossing over" because it will produce 4 genetically different offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Imagine there are 3 populations of snow hares. Snow hares have different colored fur ranging from white to brown. White snow hares can hide from predators more easily in the snow, and light brown snow hares can hide more easily in the grass and brush when the snow melts. Which of these populations of snow hares is most likely to survive this a winter with constantly changing weather and unpredictable snow?
Population 1: All the snow hares are completely white
Population 2: Most of the snow hares are completely white, but some of them have brown splotches.
Population 3: There are many snow hares of all different colors from completely white to completely brown.
Imagine there are 3 populations of snow hares. Snow hares have different colored fur ranging from white to brown. White snow hares can hide from predators more easily in the snow, and light brown snow hares can hide more easily in the grass and brush when the snow melts. Which of these populations of snow hares is most likely to survive this a winter with constantly changing weather and unpredictable snow?
Population 1: All the snow hares are completely white
Population 2: Most of the snow hares are completely white, but some of them have brown splotches.
Population 3: There are many snow hares of all different colors from completely white to completely brown.
The answer is population 3 because it has the most genetic variation.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is population 3 because it has the most genetic variation.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Which genetic process is LEAST likely to add a variety of new traits to an individual?
Which genetic process is LEAST likely to add a variety of new traits to an individual?
The answer is "accurate replication."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "accurate replication."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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A population of ferns is exposed to the same amount of a toxic chemical and only a few of the mushrooms survive. What is the best explanation for the resistance of some of the mushrooms to the chemical's effects?
A population of ferns is exposed to the same amount of a toxic chemical and only a few of the mushrooms survive. What is the best explanation for the resistance of some of the mushrooms to the chemical's effects?
The answer is "the presence of mutations in individual mushrooms."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "the presence of mutations in individual mushrooms."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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One explanation for the variety of species on Earth today is:
One explanation for the variety of species on Earth today is:
The answer is "Genetic variation allows new species to develop and adapt to ecological niches."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "Genetic variation allows new species to develop and adapt to ecological niches."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Which situation represents traits that are inheritable?
Which situation represents traits that are inheritable?
The answer is "a dog has a gene which codes for long fur. Its offspring has long fur."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "a dog has a gene which codes for long fur. Its offspring has long fur."
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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The LEAST genetic variation would be found in which of the following populations?
The LEAST genetic variation would be found in which of the following populations?
The answer is "Microbes that reproduce asexually by budding" because asexual reproduction produces genetic clones.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is "Microbes that reproduce asexually by budding" because asexual reproduction produces genetic clones.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
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Which of these examples best represents an allele?
Which of these examples best represents an allele?
The answer is "the individual letters in a genotype B or b"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "the individual letters in a genotype B or b"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the following statements is true?
Which of the following statements is true?
The answer is "a chromosome is a long section of bundled up DNA." Genes are smaller sections of DNA found in specific locations on chromosomes, and DNA is the entire length of our genetic code.
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "a chromosome is a long section of bundled up DNA." Genes are smaller sections of DNA found in specific locations on chromosomes, and DNA is the entire length of our genetic code.
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the following genotypes is homozygous recessive?
Which of the following genotypes is homozygous recessive?
The answer is "gg" because both letters are lowercase.
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "gg" because both letters are lowercase.
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the numbers on this diagram is a chromosome?
Which of the numbers on this diagram is a chromosome?
The answer is "2"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "2"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the numbers on this diagram is an allele?
Which of the numbers on this diagram is an allele?
The answer is "1"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "1"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the following numbers on this diagram represents a gene?
Which of the following numbers on this diagram represents a gene?
The answer is "3"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "3"
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the numbers on this diagram represents DNA?
Which of the numbers on this diagram represents DNA?
The answer is "all of these."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "all of these."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of the following genotypes is heterozygous?
Which of the following genotypes is heterozygous?
The answer is "Ww."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "Ww."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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The physical trait, "brown eyes" is best described as:
The physical trait, "brown eyes" is best described as:
The answer is "a phenotype."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
The answer is "a phenotype."
DNA is the set of instructions for our physical traits. Small sections of DNA that code for a single trait are called genes. Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Our genotype is our genetic code. When we are writing our genotype we show our genetic code by using two alleles because we get one from our mothers and one from our fathers. Our phenotype is our physical traits. If brown eyes are dominant to blue eyes, we will represent brown eyes with a “B” and blue eyes with a “b”. Because we have two alleles, there are 3 different ways we can write a genotype. We can write a genotype as Bb, BB, or bb.
Heterozygous means that a genotype has a dominant allele from one parent and a recessive allele from the other parent. (Bb) Homozygous dominant means that a genotype has two dominant alleles. (BB) homozygous recessive means that a genotype has two recessive alleles. (bb)
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Which of these processes is most important for genetic variation?
Which of these processes is most important for genetic variation?
The answer is meiosis because that is where "crossover" and recombination of DNA take place in sexual reproduction, increasing genetic variation of offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
The answer is meiosis because that is where "crossover" and recombination of DNA take place in sexual reproduction, increasing genetic variation of offspring.
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist. For example, if a population of organisms has the same genetic makeup, it is far less likely to survive disease, drought, or predation than one with genetic variation.
Compare your answer with the correct one above