Practicing Success
Read the given passage and answer the questions that follow :- |
The effects of genetic drift are more marked in which population? |
Larger populations Mendelian populations Island populations Smaller populations |
Smaller populations |
The correct answer is Option (4)-Smaller populations The effects of genetic drift are more marked in "Smaller populations." Genetic drift is a random process that describes the change in allele frequencies within a population due to chance events. In smaller populations, genetic drift tends to have a more significant impact because chance events can exert a more noticeable effect on allele frequencies. In smaller populations, random events, such as the death or reproduction of a few individuals, or the migration of a small number of individuals, can result in more pronounced fluctuations in allele frequencies. This randomness can lead to the loss of genetic diversity or the fixation of certain alleles within the population over time. In larger populations, genetic drift is less noticeable because chance events have less impact on the overall allele frequencies due to the larger gene pool, which buffers against random fluctuations. Larger populations tend to maintain more genetic diversity and are less susceptible to rapid changes in allele frequencies solely due to genetic drift.
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