Study Goals Exam 3 Week 8

Question 1

What are 5 major ways that populations evolve?

Answer 1

-Non-random Mating
-Natural Selection
-Genetic Drift
-Gene Flow
-Mutation

Question 2

What is the purpose of the Hardy-Weinberg Principle?

Answer 2

To test what happens in an entire population when all of the individuals and all possible genotypes bred

Question 3

Why doesn’t inbreeding lead to evolution, yet still leads to evolutionary change?

Answer 3

Less genetic diversity but can lead to deleterious recessive traits

Question 4

How do directional selection, stabilizing selection, disruptive selection, and balancing selection affect genetic variation?

Answer 4

-Directional=changes average value of a trait
-Stabilizing=reduces variation in a trait
-Disruptive=increases variation in a trait
-Balancing=maintains variation in a trait

Question 5

What is sexual selection?

Answer 5

One or both sexes choosing things about the other sex that affect evolution

Question 6

What is sexual dimorphism?

Answer 6

Differences in physical characteristics between sexes of the same species