AP BIOLOGY

Detailed explanation-1: -Genetic drift is an evolutionary process which leads to changes in allele frequencies over time.

Detailed explanation-2: -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.

Detailed explanation-3: -Genetic drift involves changes in allele frequency due to chance events – literally, “sampling error” in selecting alleles for the next generation.

Detailed explanation-4: -There are five key mechanisms that cause a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by: mutation, genetic drift, gene flow, non-random mating, and natural selection.

Detailed explanation-5: -There are four such forces: mutation, gene flow, genetic drift, and natural selection.