The population established there by 1993 had larger and wider bills than nonbreeding visitors High frequencies of disease alleles in some isolated human populations. If genetic drift is the only evolutionary force at work, eventually one allele will drift to a frequency of 1. Probability of an allele being lost through drift is inversely proportional to its initial frequency.
Reduced heterozygosity is most dramatic with selfing.
F provides a measure of the extent to which inbreeding has increased the frequency of homozygotes and decreased the frequency of heterozygotes relative to Hardy-Weinberg. Inbreeding depression widespread in plants and animals.