10. Sexual Selection

Question 1

who coined the term sexual selection

Answer 1

Darwin: he wrote about it in his book

Question 2

what are secondary sexual characteristics

Answer 2

traits which gives the owners a mating advantage over others of the same sex

Question 3

true or false:

secondary sexual characteristics are not connected to with gamete production or transfer

Answer 3

true

Question 4

give 2 examples of secondary sexual characteristics

Answer 4

weapons eg antlers

elaborate displays and colours

Question 5

why is there competition for reproduction

Answer 5

• females have a lower rate of reproduction

- female eggs are large and ‘expensive’

Question 6

describe Batemans study (1948)

Answer 6

drosophila

the more females introduced the more offspring

Question 7

what are the two forms of sexual selection

Answer 7

intra-sexual selection

inter-sexual selection

Question 8

explain the difference between intra and inter sexual selection

Answer 8

intra= competition for mates between individuals of the SAME SEX

inter=mate choice- females are able to be choosy

Question 9

what are the 3 rituals and displays exhibited by red deer

Answer 9

1) roaring- warns off other males
2) parallel walking- allows them to size tip their opponent
3) fight- if they both think they can take each other