Question

Crossing over occurs between __________.

• A. Sister chromatids of homologous chromosome
• B. Non-sister chromatids of homologous chromosome
• C. Sister chromatids of non-homologous chromosome
• D. Non-sister chromatids of non-homologous chromosome

Answer 1

The correct option is B Non-sister chromatids of homologous chromosome

Crossing over, or recombination is the exchange of chromosome segments between non-sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity. Crossing over takes place in the pachytene phase of meiosis I division. During crossing over, segments are exchanged between non-sister chromatids of the homologous chromosomes.

So, the correct answer is option B.