All GRE Subject Test: Biology Resources
Example Questions
Example Question #1 : The Cell Cycle
Crossing over occurs during which stage of meiosis?
Possible Answers:
Metaphase I
Prophase II
Anaphase I
Prophase I
Metaphase II
Correct answer:
Prophase I
Explanation:
In the process of meiosis, crossing over (the exchange of genetic material between homologous chromosomes resulting in recombination) only occurs during prophase I, when pairs of homologous chromosomes recombine during synapsis. This contributes to the increase in diversity due to sexual reproduction.
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All GRE Subject Test: Biology Resources
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