What is sexual selection
An evolutionary explanation of partner preference of partner preferences
Attributions or behaviour that increase reproductive success are passed on and may become exaggerated over succeeding generations of offspring
What Is human reproductive behaviour
Refers to any behaviour which relates to to oppurtunities to reproduce and thereby increase the survival chances of our genes
Includes evolutionary mechanisms such as mate choice and mate competition
What’s anisogamy
Refers to the difference between male and female sex cells
What is inter sexual selection
Mate choices by males or females
What is intra-sexual selection
Competition between individuals of the same sex (male-male or female-female)
What do evolutionary psychologists believe
They believe that. The psychological processes that people use to choose a partner come from evolution
What is natural selection
It is the process when characteristics that make an individual more likely to reproduce and pass on their genes become more prevalent in a population
What is the relationship between natural selection and sexual selection
One of the processes of natural selection is sexual selection
What is sexual selection
Within a species there are certain characteristics that make an individual more able to find a partner (e.g young physically attractive)
What are characteristics that have been evolved from sexual selection
Young
Physically attractive
What do the characteristics from sexual selection give
These characteristics give an individual a reproductive advantage therefore they become more prevalent
What are the conflicts between natural and sexual selection
However there can be a conflict between natural selection and sexual selection as sometimes the traits that are attractive making an individual less likely to survive (e.g peacocks)
What is anisogamy
Difference between male and female sex cells gives rise to different mating strategies
What is intra sexual selection
Within each sex
Members of one sex (usually male) compete for access to the other sex(usually female) leading to male-female dimorphism
What does intra sexual selection lead to
Male-female dimorphism
What is inter-sexual selection
Between the sexes
One sex (usually females) chooses from available perspective mates (usually males)
Which sexual selection is within each sex
Intra sexual selection
What sexual selection is between the sexes
Inter-sexual selection
What is parental investment theory
Reproductive behaviours originate in the amount of parental investment put in to offspring
What is true about male parental investment
Males investment in offspring is relatively small and the best way to maximise success is to mate as often as possible - quantity over quality
What do men aim for in terms of parental investment theory
Quantity over quality
What is true about female parental investment
Whereas females invtesmnt is substantial and the best chance of reproductive success is to ensure the survival of a small number offspring - quality over quantity
What do women aim for in terms of parental investment
Quality over quantity
What was Clark and Hatfield procedure
Sample of male and female students approached stranger of the opposite sex with three requests