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प्रश्न
A human population has a higher-than-usual percentage of individuals with a genetic disease. The most likely explanation is ______.
पर्याय
natural selection
gene flow
genetic drift
all of these
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उत्तर
A human population has a higher-than-usual percentage of individuals with a genetic disease. The most likely explanation is genetic drift.
Explanation:
A human population having a higher-than-usual percentage of individuals with a genetic disease is most likely due to genetic drift. This is especially true for small populations, where chance events can cause certain alleles, including those for genetic diseases, to become more common or lost. Natural selection and gene flow could also affect allele frequencies but genetic drift is the most typical explanation for random increases of disease alleles in certain populations.
