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Genetic drift is an important evolutionary mechanism that explains changes in the genetic composition of human populations over generations. It refers to the random fluctuations in the frequency of alleles within a population due to chance events rather than natural selection. In the study of biological diversity in human populations, genetic drift helps explain why certain genetic traits become more or less common among different groups, especially those that are small, isolated, or have experienced population reductions. Unlike natural selection, where genetic changes occur because certain traits __________ ___ __________ ________ ___ ____ ________ _______ ____ _______ ______.
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