AP BIOLOGY

Detailed explanation-1: -What is genetic drift? Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events. To be more exact, genetic drift is change due to “sampling error” in selecting the alleles for the next generation from the gene pool of the current generation.

Detailed explanation-2: -Genetic drift describes random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time. These variations in the presence of alleles are measured as changes in allele frequencies.

Detailed explanation-3: -Genetic drift, also known as allelic drift or the Wright effect, is the change in the frequency of an existing gene variant (allele) in a population due to random chance. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation.

Detailed explanation-4: -Allele frequencies appear to change randomly as if the frequencies were drifting, thus a random loss or change in frequencies of alleles in a small population is Genetic drift.

Detailed explanation-5: -Random forces lead to genetic drift Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time.