Explanation:
After a calamity, like a disease, fire or floods, hits a population, it could suddenly decrease the population size. This would also cause a drastic change in allelic frequencies from that of the initial population.
The founder effect is when this small population with reduced genetic variation repopulates into a population with lower genetic variation compared to the initial population before the population bottleneck. This founder effect may lead to genetic drift in the population, high levels of inbreeding, and reduced capacity of the population to adapt to changes in the environment.
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Answer:
Genetic drift that occurs after a small number of individuals colonize a new area.
Explanation:
