As Gautschi et al. explain, genetic drift, arguably the most powerful evolutionary force at work in small populations, results from the random sampling of alleles from one generation to the next ...

Aa Aa Aa Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population ...

According to this hypothesis, most of the changes in DNA inside individuals are the result of "genetic drift" -- random changes that go on all the time and aren't steered by natural selection in ...