Without crossing over,
A)cells could not complete meiosis.
B)meiosis could not produce haploid gametes.
C)only a small number of unique gametes could be produced by a single individual.
D)genetic recombination could not occur.

Question

Quizplus · Accepted Answer

Crossing over during meiosis is the process where homologous chromosomes exchange genetic material, which increases genetic diversity in the offspring. If crossing over did not occur, genetic recombination could not happen, leading to a reduction in genetic diversity. Therefore, the correct answer is D, genetic recombination could not occur. A is also correct to some extent, as crossing over is essential for the separation of homologous chromosomes during meiosis I, and without it, meiosis cannot be completed correctly. However, B and C are incorrect, as meiosis can still produce haploid gametes even without crossing over, and although crossing over does enhance genetic diversity, a significant number of unique gametes can still be produced without it.

Without Crossing Over