[Campbell Biology P.543] The text discusses the increase in frequency of an allele conferrin... | Practice Question

The text discusses the increase in frequency of an allele conferring DDT resistance in Drosophila melanogaster due to DDT exposure. This scenario is a prime example of which evolutionary mechanism?

  • A: Genetic drift
  • B: Founder effect
  • C: Natural selection
  • D: Bottleneck effect

Explanation

The passage explicitly states that 'By consistently favoring some alleles over others, natural selection can cause adaptive evolution' and uses the DDT resistance in D. melanogaster as an example where 'DDT is an effective poison that is a strong selective force'. This describes natural selection.