Which event during meiosis is directly responsible for producing new combinations of alleles on the same chromosome?

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Question

Which event during meiosis is directly responsible for producing new combinations of alleles on the same chromosome?

Accepted Answer

B. Crossing over between non-sister chromatids — Crossing over between non-sister chromatids of homologous chromosomes during prophase I results in the physical exchange of chromosomal segments, creating new combinations of alleles on individual chromosomes (recombinant chromosomes). Independent assortment shuffles whole chromosomes but does not create new allele combinations within a single chromosome.

Answer

A. Independent assortment of homologous pairs

Answer

D. Replication of DNA before meiosis begins

Answer

B. Crossing over between non-sister chromatids

Answer

C. Separation of sister chromatids in meiosis II

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