Question

The process of crossing over that takes place during meiosis is advantageous because it

• A. Makes for healthy offspring
• B. Provides a source of genetic variation
• C. Creates a random mix of chromosomes
• D. Allows gametes to have half the number of chromosomes
• E. Increases the number of gametes

Answer 1

Answer: (B)

Provides a source of genetic variation

Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes and produces new genetics combinations or variations. It does not confer health advantages or does not increase the number of gametes. A number of chromosomes are halved in gametes due to the separation of homologous chromosomes and their movement to opposite poles during anaphase I.

So, the correct answer is B.