Genetic drift

genetic drift

occurence of characteristics in a population as a result of chance rather than natural selection occurs in small populations only

founder effect

type of genetic drift where a new population is formed by a small number of individuals; the small sample size can cause marked deviations in allele frequencies from the og population from homeland and current location

bottleneck effect

extreme form of genetic drift that occurs when the size of a population is severely reduced due to a suddent event such as natural disaster; allele frequency of survivors may not reflect og population

difference between genetic drift and natural selection

genetic drift is random while natural selection is driven by fitness of individual in environment