1. GENETIC EQUILIBRIUM I Types of Selectionpp

2. WHAT IS EQUILIBRIUM?
No net change in the population
Evolution is likely not occurring

3. Hardy-Weinberg Principles
To stay in equilibrium:
No natural selection
No mutations
No gene flow (no migration)
Infinitely large population
Mating is random

4. Most traits follow a normal distribution curve with the average being the peak in the population.

5. WHAT PUSHES A POPULATION OUT OF EQUILIBRIUM?

7. I. Natural selection
Acts on physical manifestation of trait or behaviors
Organisms best suited to their environment live to reproduce and pass on their genes
Organisms that reproduce the most offspring have the greatest fitness
Varying types of selection

8. Directional selection: individuals with a more extreme form of trait have higher fitness

9. Stabilizing selection: having average form of trait has highest fitness

10. Disruptive selection: individuals with any extreme trait has a higher fitness

11. Sexual selection: choose mates based on specific traits and those traits increase in the population

12. Artificial selection