Unit 3 Week 3

Question 1

contribution an individual makes to the gene pool of the next generation, relative to the contributions of other individuals

Answer 1

relative fitness

Question 2

selection that favors phenotypes at one end of the spectrum of existing variation

Answer 2

directional selection

Question 3

selection that favors two or more distinct phenotypes

Answer 3

diversifying (disruptive) selection

Question 4

selection that favors average phenotypes

Answer 4

stabilizing selection

Question 5

fitness of a phenotype depends on how common it is in the population

Answer 5

frequency dependent selection

Question 6

selection pressure on males and females to obtain matings

Answer 6

sexual selection

Question 7

phenotypic differences between males and females

Answer 7

sexual dimorphisms

Question 8

selection that leads to evolution of traits in males for aggressive interactions with other males over access to females

Answer 8

intrasexual selection

Question 9

selection that occurs when individuals of one sex are choosy when selecting a mate

Answer 9

intersexual selection

Question 10

the general reason why natural selection cannot make perfect organisms

Answer 10

evolution is opportunistic