Explain the process of crossing over and how it increases genetic diversity.

Crossing Over. Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

if you know your abc's you should be able to get your answer or just use google