0 a situation in which the frequency of a particular gene in a small population of living things changes without a known cause --
1 a situation in which the number of a particular gene in a small population of living things changes without a known cause --
Given that distance estimators based on allele frequencies rely on genetic drift, they are sensitive to changes in population size.
The process of differentiation of the frequencies of non-selected ancestral alleles in different taxonomic groups due to genetic drift begins immediately after a speciation event.
There can be no doubt that evolutionary potential is reduced by genetic drift and inbreeding in small populations.
During the establishment of these populations, bottlenecks and the effects of genetic drift may result in unrepresentative genotypic distributions and loss of variation.
On the other hand, parasites from such host populations may also be less variable, because they themselves experience genetic drift, and therefore less virulent.
The forces that cause differentiation for these markers would be the result of mutation, genetic drift and no selection.
Two forces affect the inbreeding and genetic drift at neutral loci linked to loci under selection.
The biology of the crop would suggest that in its natural habitat, 'populations' could evolve by genetic drift into isolation, inlocalities such as river valleys.
