Question

which of the statements below about crossing over is correct.
a. it results in the exchange of genetic material between homologous chromosomes
b. it occurs between non-homologous chromosomes
c. it decreases genetic variation
d. it occurs during mitosis

Answer 1

The correct statement about crossing over is:

a. it results in the exchange of genetic material between homologous chromosomes.

Crossing over occurs during meiosis, specifically in prophase I, and involves the exchange of genetic material between homologous chromosomes, which increases genetic variation in the resulting gametes.