Question

what is meant by genetic drift?​

Answer 1

Here is your answer MATE

$\underline{\mathfrak{\huge{Genetic\:drift}}}$ :-

The sudden change in the frequency of genes in a population is known as Genetic Drift.

Answer 2

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.

Although genetic drift happens in populations of all sizes, its effects tend to be stronger in small populations.

Genetic drift may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to 100%, percent frequency, of other alleles.

Genetic drift can have major effects when a population is sharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).