AP BIOLOGY

Detailed explanation-1: -Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up. When two chromosomes-one from the mother and one from the father-line up, parts of the chromosome can be switched. The two chromosomes contain the same genes, but may have different forms of the genes.

Detailed explanation-2: -This process, also known as crossing over, creates gametes that contain new combinations of genes, which helps maximize the genetic diversity of any offspring that result from the eventual union of two gametes during sexual reproduction.

Detailed explanation-3: -Crossing over allows for the rearrangement of genetic code within the chromosome. In other words, in addition to the 223 different cell types that can be created because of independent assortment, crossing over is an additional way your cells generate diversity in sperm and egg cells during meiosis.