Question

All of the following are sexual sources of genetic variation except:

Options

• crossing-over

• mutation

• production of offspring from two parents

• random fertilization

Answer 1

Mutation

Explanation:

Crossing-over, production of offspring from two parents, and random fertilization are sexual processes that cause genetic variation by shuffling genes during meiosis and fertilization. Mutation, however, is not a sexual source; it is a spontaneous or induced change in DNA sequence that can occur independently of sexual reproduction. Thus, mutation is a non-sexual source of genetic variation, while the others are sexual sources.