Final answer:
Genetic drift refers to the random change in allele frequencies in a population over time.
Step-by-step explanation:
Genetic drift refers to the random change in the frequency of alleles in a population over time. It occurs due to chance events rather than natural selection. To determine if a population is experiencing genetic drift, we need to compare the observed allele frequencies to the expected frequencies under Hardy-Weinberg equilibrium. If there is a significant difference between the observed and expected frequencies, it suggests that genetic drift is occurring.