Final answer:
Genetic drift is a random change in allele frequencies that occurs in a small population. It can lead to the elimination of an allele from a population by chance. This process can occur more quickly in small populations and can be magnified by natural or human-caused events.
Step-by-step explanation:
Genetic drift is a random change in allele frequencies that occurs in a small population. It is the effect of random chance on a population, where the allele frequencies in the offspring differ from the allele frequencies in the parents. Genetic drift can lead to the elimination of an allele from a population by chance. This process can occur more quickly in small populations, and it can also be magnified by natural or human-caused events, such as disasters or migrations.