7. sexual selection

Question 1

Sexual selection

Answer 1

selection on traits that affect mating success.
–> Depends on the advantage which certain individuals have over other individuals of the same sex and species in exclusive relation to reproduction

Question 2

Intrasexual selection

Answer 2

members of the same sex compete for access to the other sex

Question 3

Intersexual selection

Answer 3

individuals of one sex chose which individuals of the other sex to take as mates

Question 4

Bateman’s principle

Answer 4

1. Females should be the choosier sex because eggs are expensive to produce
2. because a female’s potential reproductive success is limited compared with that of a male
3. Female’s greater choosiness in mate selection should translate into greater variance in the reproductive success of males

Question 5

Evolutionary models of mate choice:

Answer 5

1. Direct benefits
2. Good genes
3. Runaway sexual selection
4. Sensory bias