sexual selection

Question 1

sexual selection is driven by…. not….

Answer 1

mating

not offspring

Question 2

fecundity

Answer 2

number of offspring produced

Question 3

fertility

Answer 3

ability/ ‘choice’ to produce offspring

Question 4

intrasexual selection and example

Answer 4

competition between members of same sex

e.g. stag fights

Question 5

intersexual selection and example

Answer 5

interaction between members of different sex

e.g. birds of paradise

Question 6

monogamy

definition, example, consequences

Answer 6

1 male and 1 female

e. g. albatrosses (extra pair paternity, cheating, is common)
v. little sexual selection and no sexual dimorphism

Question 7

polygamy

define, consequences

Answer 7

male and female have multiple partners
sexual selection and dimorphism
causes intrasexual competition e.g. mate guarding/ sperm

Question 8

Polyandry

define, consequence, example

Answer 8

female has multiple partners
sexual selection and dimorphism
causes intrasexual competition e.g. mate guarding/ sperm
causes intersexual selection e.g. female choice (epigamic selection)

Question 9

polygyny

define, consequence, example

Answer 9

male has multiple partners
sexual selection and dimorphism
causes intrasexual competition e.g. mate guarding/ sperm

Question 10

lek competition, define, example, type of competition

Answer 10

males compete with each other
females choose the best mate
e.g. red deer
intra and inter

Question 11

benefits of monogamy

Answer 11

males- genetic material definitely passed on

females - shared parental care and resources

Question 12

benefits of non-monogamy

Answer 12

males - genetic material in multiple genetic lines

females - offspring have higher genetic variation