Question Detail

BIO 101 BIO 101 Past Questions Objective Question

Question

What is the significance of crossing over during meiosis?
Options
A To replicate DNA
B To increase genetic variation
Correct Answer
C To form sister chromatids
D To separate chromosomes
Correct Answer

Option B is the correct answer.

Detailed Explanation

Crossing over, the exchange of genetic material between non-sister chromatids of homologous chromosomes during prophase I, produces new combinations of alleles on chromosomes (recombinants). This is a major source of genetic variation in gametes.

Hint

It shuffles genes between homologous chromosomes.

Question Info