Ch. 19.3

Question 1

adaptive evolution

Answer 1

selects for beneficial alleles that allow environmental adaptation

Question 2

Darwinian fitness

Answer 2

measure of the individuals fitness relative to other individuals in a population

Question 3

Stabilizing selection

Answer 3

Selection against extremes
genetic variability decreases

Question 4

Directional selection

Answer 4

acts at one end of the spectrum of existing variation
shift variability to new phenotype

Question 5

Diversifying selection

Answer 5

increases variation in the population
favors extremes

Question 6

Frequency dependent selection

Answer 6

favors traits either common or rare
think rock paper scissors

Question 7

negative frequency dependent selection

Answer 7

increases genetic variability

Question 8

positive frequency dependent selection

Answer 8

decreases genetic variability

Question 9

Sexual selection handicaps

Answer 9

more attractive to F but more likely to be eaten

Question 10

Sexual selection honest signals

Answer 10

implies males with such traits have good genes