Relationships - Done Flashcards
What did Charles Darwin notice in regards to reproduction?
Evolution favours some features that are attractive to the opposite sex which make it more likely that the individual will attract a mate and reproduce to pass on genes
What is sexual selection?
The process by which traits that increase reproductive success are passed on to succeeding generations of offspring?
What are the two types of sexual selection?
- Inter-sexual selection
- Intra-sexual selection
What is inter-sexual selection?
Traits that enable an individual to attract members of the opposite sex, indicators of attractiveness
What is intra-sexual selection?
- A strategy used by males
- Competition between members of this sex to access to mates
- The winner gets to reproduce and pass his offspring the traits that enabled them to be victorious
What is Anisogamy?
The differences between male and female sex cells
What does Anisogamy dictate?
Different optimum mating strategies for males and females
What are the key facts about male gametes?
- Created continuously in vast numbers from puberty to old age
- Don’t require much energy to produce
- The later investment that is made in offspring is far less compared to females
How does male gametes influence partner preference?
- Will seek short-term relationships with fertile women and can produce healthy offspring:
- Indicators of this are youthful appearance and an hourglass figure
How does what men seek in a partner influence reproductive success?
- The most adaptive reproductive behaviour is to mate with numerous females in order to best increase the chances of his genes being passed down to further generations
What are the key facts about the female reproductive system (evolutionary explanation?
- 1 female egg is produced only once and only till menopause and require great energy to produce
- Females make a large investment in time, commitment and other resources during and after the birth of her offspring
How does the female reproductive system influence partner preference?
- They seek a long term relationship with a male who has the resources to provide and protect her and her offspring
- Indicators of this include a mesomorph physique, a strong jawline and traits like intelligence
How does partner preference in women increase reproductive success?
- As females can only have a limited number of offspring it is most adaptive for females to carefully choose a male with desirable traits
- This increases the likelihood that those desirable traits get passed onto the male offspring and then be chosen by the next generation.
What are the strengths of the evolutionary explanation?
- Supporting evidence for sex differences in partner preferences (Buss study)
- Supporting evidence for sex differences in reproductive behaviour (Clark and Hatfield study)
What are the weaknesses of the evolutionary explanation?
- Lacks temporal validity
- Clark and Hatfield supporting evidence has methodological flaws
What is Buss’ cross cultural study?
- Conducted a cross cultural study of 32 cultures
- Found men placed more emphasis on physical attractiveness and preferred someone younger
- Women favoured men with resources or traits such as intelligence
What is the Clark and Hatfield study?
- They sent out male and female uni students to a uni campus and were asked to approach other students asking if they would go to bed with them tonight.
- 75% of men agreed to the question but no women did
What methodological flaws does the Clark and Hatfield study have?
- The sample of participants may not be representative of the wider population due to age and culture
- University culture makes casual sex more acceptable than other areas of society
What do men find attractive?
- Hourglass figure
- Youthful appearance
- Younger women
What do women find attractive?
- Mesomorph physique
- Chiselled jawline
- Resources
Why do men prefer symmetrical faces?
It indicates genetic fitness
Who are attracted to neotenous features?
Men
What is neotenous features?
- Large eyes
- Small nose
Why are men attracted to neotenous features?
- Indicates a protective and caring instinct in females, more youthful looking