LIFE SCIENCE

Detailed explanation-1: -Typically, genetic drift occurs in small populations, where infrequently occurring alleles face a greater chance of being lost. Once it begins, genetic drift will continue until the involved allele is either lost by a population or until it is the only allele present in a population at a particular locus.

Detailed explanation-2: -Answer and Explanation: The correct answer is (a) small population. Genetic drift occurs when random events change the allele frequencies in a population. This is most likely to occur in small populations, where small random changes in allele frequencies can have a significant effect on the population as a whole.

Detailed explanation-3: -Small populations are more likely to experience genetic drift because allele frequencies are more likely to vary swiftly and substantially over a few generations or drift due to random events. Small populations might experience rapid change since each individual is different.

Detailed explanation-4: -Small populations are more susceptible genetic drift than large populations, whose larger numbers can buffer the population against chance events.