Which of the following is **not** a force that changes allele frequencies (causing evolution)?
- Mutation
- Natural selection
- Genetic drift
- Random mating in a large population
Show answer and solution
Correct answer: D. Random mating in a large population
Random mating in a large population (one of Hardy-Weinberg's assumptions) does NOT change allele frequencies.
Mutation introduces new alleles
selection favours some over others
drift randomly fluctuates them
gene flow exchanges them.
Random mating only redistributes existing alleles among genotypes.