Relationships: Factors Affecting Attraction (L1-4) Flashcards
1
Q
What is Darwin’s concept of sexual selection?
A
- about the selection of characteristics which aid successful reproduction rather than survival
- but clear that reproduction ultimately aids survival
- certain physical characteristics like male peacocks tail are a sign of genetic fitness
- so female ones who select a male with certain tails are more likely to produce robust offspring which would continue into future gen
2
Q
What features are referred to as adaptive?
A
- they are an advantage and act as competition against other males for reproductive rights
- such as aggression
- means that is this aggressive male then reproduces then is likely this trait will remain in the population
3
Q
What is the basis of human behaviour?
A
- anisogamy
4
Q
What is anisogamy?
A
- refers to the differences between male and female sex cells, gametes
5
Q
Female sex cells?
A
- eggs or ova
- large
- static
- produced at intervals for a limited number of fertile years
- require significant investment of energy
6
Q
Male sex cells?
A
- sperm
- very small
- very mobile
- created continuously in vast numbers from puberty until old age
- do not need much energy to be produced
7
Q
What is a consequence of anisogamy?
A
- no shortage of fertile males
- fertile female is a rarer source since egg production is finite due to menopause
8
Q
What does anisogamy give rise to?
A
- 2 types of sexual selection
1. inter-sexual selection
2. intra-sexual selection
9
Q
What is inter-sexual selection?
A
- between sexes
- strategies that males and females use to select the other sex
- preferred strategy of female since quality over quantity as sperm is plentiful
10
Q
What are the male strategies to increase opportunities for mating success?
A
- courtship rituals
- size
- sperm competition
- mate guarding
- sneak copulation
11
Q
What is meant by courtship rituals, male?
A
- allow males to display genetic potential
- through characteristics and resource abilities
12
Q
What is meant by size, male?
A
- males evolve to be bigger
- shows strength for success in comp with other males
- includes weaponry in some other species like antlers in deer
13
Q
What is meant by sperm competition, male?
A
- action of natural selection on males
- makes them more competitive by producing larger testicles, bigger ejaculations and faster swimming sperm
14
Q
What is meant by mate guarding, male?
A
- male fear of being cuckolded
- and spending resources raising another males child
- indulge in mate guarding to keep an eye on their partner
- remain in close contact with female partner to prevent them mating with other males
15
Q
What did Buss (1993) suggest regarding mate guarding?
A
- men are fearful of partners being sexually unfaithful
- women worry about emotional unfaithfulness, due to fear of their partner spending resources on other females
16
Q
What is sneak copulation, male?
A
- males mating with other females as well as their partner if given opportunity
- to increase chances of reproductive success
- women also gain as offspring have different fathers
- increases wider genetic diversity which increases survival
- females can benefit if partner is a rich man but then gets pregnant from genetically fit ‘stud’ but if caught risks abandonment
17
Q
What are the female strategies for inter-sexual selection?
A
- sexy sons hypothesis
- handicap hypothesis
- courtship
18
Q
What is the sexy sons hypothesis, female?
A
- devised by Fisher (1930)
- argued that females select attractive males as they will produce sons with the same attractive features
- increasing their sons and their own reproductive fitness