1. Describe how evolution can be thought of as both a fact and a theory.
WARM UP
Describe how evolution can be thought of as both a fact and a theory.

2. Gene Flow and Genetic Drift

3. Population Microevolution
Individuals don’t evolve, populations do
Small changes in gene frequency
Can occur through gene flow or genetic drift

4. Gene Flow Migration can quickly change gene/trait frequency
Especially in smaller populations

5. Genetic Drift Random chance can cause some genes/traits to disappear
Especially in small populations

6. Genetic Drift Bottleneck Severe drop in population
Leaves a small sample of traits (good or bad)
Inbreeding

7. Genetic Drift
Bottleneck

8. Genetic Drift Founder effect A migratory bottleneck
A few organisms start a new population
Inbreeding

9. WRAP UP
Compare and contrast gene flow and genetic drift.

10. WARM UP
Explain how the terms microevolution and population evolution are related.

11. WRAP UP
Compare and contrast bottlenecks and the founder effect.