Allele frequencies will thus change over time in this population due to chance events — that is, the population will undergo genetic drift. ... Genetic drift thus removes genetic variation within demes but leads to differentiation among demes, completely through random changes in allele frequencies.

Does allele frequency change?

Allele frequencies will thus change over time in this population due to chance events — that is, the population will undergo genetic drift. ... Genetic drift thus removes genetic variation within demes but leads to differentiation among demes, completely through random changes in allele frequencies.

What causes allele frequency changes?

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.