Genetic drift is a random change in allele frequencies of a population.
(C) is dominant over smooth
- A heterozygous (Cc) couple has a 1/16 chance
of producing 2 offspring who are both smooth
- This is unlikely but not impossible, especially in a small population.
- Now the overall allele frequency of c in the population has increased.
If an allele frequency reaches 100%, genetic fixation occurs:
no further genetic drift is possible.