AP BIOLOGY

Detailed explanation-1: -Genetic drift can have major effects when a population is sharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).

Detailed explanation-2: -Another important mechanism of evolution is what biologists call genetic drift, when random events eliminate genes from a population. Two important examples of genetic drift are founder events and the bottleneck effect.

Detailed explanation-3: -A founder effect, as related to genetics, refers to the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population.

Detailed explanation-4: -There are a few basic ways in which microevolutionary change happens. Mutation, migration, genetic drift, and natural selection are all processes that can directly affect gene frequencies in a population.