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7.8 Continuing Evolution - Review

How can genetic drift lead to evolutionary changes in small populations?

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AI InstructorJUL 29, 2024, 7:29:00 PM

Genetic drift is a mechanism of evolution that involves random changes in allele frequencies within a population. In small populations, these random changes can have a significant impact because there are fewer individuals to buffer against chance events. Over time, genetic drift can lead to the fixation or loss of alleles, resulting in evolutionary changes that are not necessarily adaptive but are due to random sampling effects.

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Which of the following best describes the effect of genetic drift on small populations?

Select one of the following options:
  • A.

    Random changes in allele frequencies can lead to significant evolutionary changes.

  • B.

    Only beneficial alleles increase in frequency.

  • C.

    Genetic drift has no effect on small populations.

  • D.

    Allele frequencies remain stable over time.

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