Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
sexual selection
|
charles darwin described sexual selection as depending on "The advantage which certain individuals have over others of the same sex and species, solely in respect of reproduction"
|
|
|
What are males attracted to in females
|
on average: those shorter than they are, youthful appearance, symmetrical face, full breasts, full lips, low waist-hip ratio
|
|
|
what are women attracted to in men
|
on average: those taller than they are, symmetrical face, masculine facial dimorphism, broad shoulders, narrow waist and a V shaped torso
|
|
|
Sexual dimorphism
|
females have more costly adornments than males because they have to carry offspring for 9 months, possibly be shamed in society if unmarried or underage, and males can just leave them to deal with it physically and mentally on their own.
|
|
|
sexual dimorphism
|
large differences between measures of dimorphism in monogamous and polygynous contexts can be explsined by the more intense competition between males for females in the latter.
|
|
|
3 processes
|
VARIATION
within species individuals are no identical INHERITANCE some varients are passed from parent to off spring SELECTION some inherited variables confer environmental advantages which enhance the individuals chances of survival, enabling them to reproducee more members of the species. |
|
|
measure of success in evolution
|
number of offspring/genes you leave. this is called DIFFERENTIAL REPRODUCTIVE SUCCESS, comparing one individuals success in reproduction to another
|
|
|
survival of the fittest
|
darwin recognised sotf or the purpose of reproduction
|
|
|
evolutionary psychology
|
1) evolutionary biology
2) cognitive psychology |
|
|
human eye
|
evolved through genetic mutations which lead to individuals gaining lighr sensitive cells which helped avoid predators
|
|
|
human eye
|
avoiding predators meant more mating opportunity. the offspring woulf also inherit the mutation.
|
|
|
human eye
|
through successive generations, the mutation will become more prevalent in the population as a result of DIFFERENTIAL REPRODUCTIVE SUCCESS of individuals who posses it
|
|
|
human eye
|
these adaptations enhabce the fit between the organism and the environment
|
|
|
SEXUAL DIMORPHISM
|
Charles darwin advanced the theory of sexual selection, which related sexual dimorphism with sexual selection.
|
|
|
SECUAL DIMORPHISM
|
It has been proposed that the earliest sexual dimorphism is the size differentiation of sperm and eggs
|
|
|
SEXUAL DIMORPHISM
|
Anisogomy intensifies male competition for mates, and promotes the ebolution of more sexual dimorphism in many species, including mammals
|
|
|
WHATS SEXUAL DIMORPHISM
|
sexual dimorphism is a phenotypic difference between males and females of the same species
|
