AP BIOLOGY

Detailed explanation-1: -These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. Typically, genetic drift occurs in small populations, where infrequently-occurring alleles face a greater chance of being lost.

Detailed explanation-2: -Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events.

Detailed explanation-3: -The change in allele frequency over time is called microevolution. Microevolution and the change in allele frequency occurs to to mutation, gene flow, genetic drift or selection.

Detailed explanation-4: -In genetic terms, evolution is the change in the relative frequency of alleles in a population.

Detailed explanation-5: -A change in the frequency of an allele in a population due to random sampling of organisms is called genetic drift or allelic drift. A gene pool is defined as the set of all genes of a particular species. The transfer of alleles or genes from one population to another is called gene flow or gene migration.