Examples of genetic drift

• Given enough time, genetic drift results in the fixation or loss of alleles at particular loci.

• These data suggest that purifying selection removes deletion variation before it is fixed in populations, but that insertions are capable of fixing through genetic drift.

• Molecular markers to study genetic drift and selection in wheat populations.

• This is because genetic drift drives deleterious mutants to high frequencies for all mating systems.

• Thus, each year the worms were subjected to selection pressure during 2 steps, and to genetic drift during 22 steps.

• When populations are small, effects of genetic drift are more important.

• The interaction between selection against partially recessive mutations and genetic drift in small populations also influences the rate of decay of neutral variation.

• 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.

• Two forces affect the inbreeding and genetic drift at neutral loci linked to loci under selection.

• The forces that cause differentiation for these markers would be the result of mutation, genetic drift and no selection.

• On the other hand, parasites from such host populations may also be less variable, because they themselves experience genetic drift, and therefore less virulent.

• During the establishment of these populations, bottlenecks and the effects of genetic drift may result in unrepresentative genotypic distributions and loss of variation.

• There can be no doubt that evolutionary potential is reduced by genetic drift and inbreeding in small populations.

• 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.

• Given that distance estimators based on allele frequencies rely on genetic drift, they are sensitive to changes in population size.