Multiple choice

Which of the following terms is not correctly defined?

  1. Microevolution: The changes in allele frequencies that occur over time within a population.

  2. Molecular evolution: The change in the sequence composition of cellular molecules such as DNA, RNA, and proteins over long periods of time.

  3. Habitat fragmentation: The emergence of discontinuities in an organism's preferred environment causing population fragmentation.

  4. Genetic drift: The changes in the frequency of an allele because of linkage with a positively selected allele at another locus.

  5. Population bottleneck: A sharp reduction in size of a population due to environmental random events or human activities.
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D Correct answer
Explanation

Genetic drift is the change in the frequency of an allele in a population due to random sampling. Genetic hitchhiking refers to changes in the frequency of an allele because of linkage with a positively selected allele at another locus.

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