AP BIOLOGY

Detailed explanation-1: -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-2: -Definition. Genetic drift is a mechanism of evolution characterized by random fluctuations in the frequency of a particular version of a gene (allele) in a population.

Detailed explanation-3: -What is genetic drift? Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events.

Detailed explanation-4: -What is Genetic Drift? Genetic drift is an evolutionary change in allelic frequencies of a population as a matter of chance. It occurs in very small populations, but its effects are strong. It occurs due to an error in selecting the alleles for the next generation from the gene pool of the current generation.

Detailed explanation-5: -Genetic drift affects the genetic makeup of the population, but unlike natural selection, through an entirely random process. So although genetic drift is a mechanism of evolution, it doesn’t work to produce adaptations. Read more about: The mechanism of genetic drift, sampling error.