Biology 111 Study Objectives for Chapter 23

1. What is meant by a population? a species? a gene pool?

2. What is the Hardy-Weinberg theorem, and what are the conditions necessary for it to work?

3. Describe the Hardy-Weinberg equation, and be able to use it to determine allele frequencies in a population.

4. What is meant by genetic drift? bottleneck effect? founder effect?

5. What is meant by gene flow?

6. What are reasons that mating is not generally non-random?

7. What is polymorphism? What are two things that preserve polymorphism in populations?

8. Describe the difference between stabilizing selection, directional selection & diversifying selection. Give examples of each.

9. What are reasons that evolution doesn't produce "perfect" organisms?