Random forces lead to genetic drift Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift ...

Genetic variation is usually expressed as a relative frequency, which means a proportion of the total population under study. In other words, a relative frequency value represents the percentage ...

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 ...

allowing populations to diverge in gene frequencies. My graduate student, Michael Cachelin and I used microsatellites to look at the population structure of three Wyoming black bear populations (Fig.