AP BIOLOGY

Detailed explanation-1: -Mutation: The change in the genes of individuals living in a population leads to genetic variation. Genetic recombination: The fusion of gametes promotes the various combination of genes in a population leading to genetic variation.

Detailed explanation-2: -Origins of genetic variation Mutations and recombination are major sources of variation.

Detailed explanation-3: -Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.

Detailed explanation-4: -Genetic recombination occurs naturally in meiosis. Meiosis is the process of cell division that occurs in eukaryotes, such as humans and other mammals, to produce offspring. In this case, it involves crossing-over. What happens is that two chromosomes, one from each parent, pair up with each other.

Detailed explanation-5: -Two sources of genetic diversity in meiosis are independent assortment and crossing over. Independent assortment of homologous chromosomes occur during metaphase of meiosis I.