M3 Selection

Question 1

What are the conditions for natural selection?

Answer 1

1. variation within population
2. variation is heritable
3. variation contributes to differentia survival and reproduction

Question 2

What is fitness?

Answer 2

The ability to survive and produce viable offspring

Question 3

What is stabilizing selection?

Answer 3

Favors intermediate phenotypes (mean doesn’t change)

Question 4

What is direction selection?

Answer 4

Favors one extreme phenotype (mean changes but variance doesn’t)

Question 5

What is disruptive selection?

Answer 5

Favors both extreme phenotypes (mean and variance don’t change)

Question 6

What is frequency dependent selection?

Answer 6

The fitness of a phenotype changes with its commonality
(positive, increases as it becomes common; negative, decreases as it becomes common)

Question 7

What is sexual selection?

Answer 7

Favoring males who produce certain characteristics so that females find them attractive (or traits that allow them to compete with men) and mate