Crossing-Over Produces Genetic Variation During Prophase I of Meiosis I

question 61

Multiple Choice

Crossing-over produces genetic variation during prophase I of meiosis I. This occurs when

• A) homologous chromosomes come close together and a rearrangement of alleles occurs.
• B) sister chromatids come close together and a rearrangement of alleles occurs.
• C) random chromosomes come close together and a rearrangement of alleles occurs.
• D) sister chromatids align randomly on the metaphase plate before they are separated.

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