Pre and postzygotic

Question 1

What is a prezygotic barrier

Answer 1

Occurs before fertilization

Question 2

Temporal isolation

Answer 2

Mating or flowering occurs at different seasons or times of day

Question 3

Habitat isolation

Answer 3

Populations live in different habitats and do not meet

Question 4

Behavioral isolation

Answer 4

There is little or no sexual attraction between different species

Question 5

Mechanical isolation

Answer 5

Structural differences in genitalia or flowers prevent copulation or pollen transfer

Question 6

Gametic isolation

Answer 6

Male and/or female gametes die before uniting or fail to unite

Question 7

What is a postzygotic barrier

Answer 7

Occurs after fertilization (prevents the development of fertile adults)

Question 8

Hybrid zygote

Answer 8

Results from union of two games of different species

Question 9

What are the postzygotic barriers

Answer 9

Hybrid inviability, hybrid sterility, hybrid breakdown

Question 10

Hybrid inviability

Answer 10

Hybrids fail to develop or reach sexual maturity

Question 11

Hybrid sterility

Answer 11

Hybrids fail to form functional gametes

Question 12

Hybrid breakdown

Answer 12

Offspring of hybrids are weak or infertile

Question 13

Name all of the prezygotic barriers

Answer 13

Temporal isolation, habitat isolation, behavioral isolation, mechanical isolation, game tic isolation