Practice question from Biology Essentials
Which of the following is NOT a requirement for Hardy-Weinberg equilibrium? A. Large population size B. Random mating C. Natural selection occurring D. No gene flow E. No mutations
Answer
C
Explanation
Hardy-Weinberg equilibrium requires the ABSENCE of natural selection. The five conditions for Hardy-Weinberg equilibrium are: no mutations, random mating, no gene flow (migration), infinitely large population (no genetic drift), and no natural selection. If natural selection occurs, allele frequencies will change over time.