relationships

Question 1

evolutionary approach

Answer 1

• survival of the sexiest
• characteristics that maximise individuals ability to survive and reproduce successfully are highly adaptive and likely to be ‘naturally selected’
• individuals with these genes go on to form successive generations

Question 2

what is sexual selection

Answer 2

view that competition for mates between individuals of the same sex affects the evolution of certain traits
- traits that increase reproductive success
- more likely to survive

Question 3

what are the two types of sexual selection

Answer 3

intra sexual selection
- mate competition
- members of one sex (male) compete with each other for females
- winners get mate
- losers genes are not passed on
inter sexual selection
- mate choice - battle of the sexes
- preference of one sex (females) for members of the opposite sex who process certain qualities (height, muscular)
- inter selection determines intra

Question 4

what is anisogamy

Answer 4

differences between males and females
have different sex/reproductive cells
- causes difference in level of investment and reproduction

Question 5

what is diamorphism

Answer 5

refers to the difference between males and female
same species but clear difference in shape and size