Population Genetics · Zoology

Which evolutionary force changes allele frequencies in a non-random direction based on fitness?

  1. Random genetic drift over generations
  2. Spontaneous mutation of DNA
  3. Gene flow between populations
  4. Natural selection
Show answer and explanation

Correct answer: Natural selection

Natural selection favors alleles that increase fitness. This leads to predictable, non-random changes in allele frequencies.

Difficulty: Medium Question 18 of 20

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