LIFE SCIENCE

Detailed explanation-1: -Genetic drift is the change in frequency of an existing gene variant in the population due to random chance. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. It could also cause initially rare alleles to become much more frequent, and even fixed.

Detailed explanation-2: -The composition of a population’s gene pool can change over time through evolution. This can occur by a variety of mechanisms, including mutations, natural selection, and genetic drift. The result is a gene pool that is altered to be attuned to the needs of the population’s specific environment.

Detailed explanation-3: -Extremely large population. In small populations, chance fluctuations in the gene pool will cause allele frequencies to change over time. These random changes are called genetic drift.