7.10: Reproductive Isolation Intro

Question 1

Speciation occurs due to ___ _____.

Answer 1

Reproductive isolation

Question 2

What are the two types of reproductive isolation?

Answer 2

1, prezygotic barriers (before fertilization)

2. Postzygotic barriers (after)

Question 3

Recap: what is a zygote?

Answer 3

Fertilized egg cell

Question 4

What do both the prezygotic barrier and postzygotic barriers maintain and prevent?

Answer 4

• Both maintain isolation

- both prevent gene flow between the populations

Question 5

What do prezygotic barriers do?

Answer 5

• prevent mating or hinder fertilization

- so they essentially prevent the formation of zygote

Question 6

What are the five types of prezygotic barriers?

Answer 6

1. Habitat isolation
2. Temporal Isolation
3. Behavioral isolation
4. mechanical isolation
5. Gametic isolation

Question 7

What are postzygotic barriers?

Answer 7

• prevent a hybrid zygote from developing into a viable, fertile adult

Question 8

What are the three types of postzygotic barriers?

Answer 8

1. Reduced hybrid viability
2. Reduced hybrid fertility
3. Hybrid breakdown