The founder effect is an extreme example of "genetic drift." Genes occurring at a certain frequency in the larger population will occur at a different frequency -- more or less often -- in a ...

Whereas inbreeding can lead to a reduction in genetic variation, outbreeding can lead to an increase. Random forces lead to genetic drift Sometimes ... entire range. For example, individuals ...

Aa Aa Aa Natural selection, genetic drift, and gene flow are the mechanisms ... maintains genetic polymorphism in populations. For example, if heterozygotes at a locus have higher fitness than ...

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 ...

A new study has revealed new insights into how ancient Europeans adapted to their environments over 7,000 years of European ...