SEARCH
You are in browse mode. You must login to use MEMORY

   Log in to start

level: intrasexual and intersexual selection

Questions and Answers List

level questions: intrasexual and intersexual selection

QuestionAnswer
intersexual selectionselection between sexes preferred by females quality > quantity
why do females prefer quality?females produce fewer eggs in her lifetime than men produce sperm women also use more energy to produce eggs than men
Fisher Sexy Sons hypothesis- females mate with males with desirable characteristics - their sons inherit the "sexy trait". this will increase chances of the sons producing offspring
Intrasexual selection- most common strategy among men - quantity > quality - the 'winner' of the competition gets to pass characteristics that contributed to his victory by offspring
consequences of intrasexual selection- dimorphism : obvious differences between males and females. larger males are likely to win physical competitions with other male, being a larger male is an advantage. - males can also behave aggressively to 'protect' their fertile females from other men.
anisogamy- male reproductive strategy to mate with as many fertile females as possible - less energy needed to produce sperm and take care of offspring
changing of partner preferences- women can be less cautious as there is higher availability of contraception - women also do not have to worry about limited time given for fertility as medicine has advanced - females are also more present in the workforce, so they do not have to be financially dependent on men
Singh tested the role of female hip to waist raito in influencing male preference- 0.7 hip to waist ratio was the most preferred - wider hips and smaller waist shows signs of fertility but not had kids yet