Natural forces affecting population equilibrium
- If gene and genotype frequencies remained constant generation after generation in natural population, the population would have constant genetic composition and there would be no evolution.
- It is generally accepted that most natural populations are constantly evolving.
- Gene frequencies in Mandelian population change due to one or more of following factors:-
- Migration
- Mutation
- Selection
- Random drift
- These factors are evolutionary factors because they lead to evolution in natural population.