AP BIOLOGY

Detailed explanation-1: -The heritable variation is defined as the variance of the breeding values among individuals, A 2, which is known as the additive genetic variance. (Note that additive genetic variance excludes transient effects transmitted to offspring, such as additive-by-additive epistatic effects).

Detailed explanation-2: -Because these variations arise due to change in the genetic material of germplasm or gametes.

Detailed explanation-3: -Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).

Detailed explanation-4: -A person’s skin color, hair color, dimples, freckles, and blood type are all examples of genetic variations that can occur in a human population.

Detailed explanation-5: -The genetic diversity has three different sources: mutation, recombination and immigration of genes. Mutation is the driving force of genetic variation and evolution.