sperm is small, mobile, and continuously produced from puberty to old age
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describe the female sex cell
ova are larger, static and produced at intervals for a limited number of years
3 of 10
consequences of anisogamy
there are plenty of fertile males but fewer female, giving rise to different mating strategies
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what is inter-sexual selection
selection of mates between sexes
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female strategy - quality over quantity
females make greater investments of time, commitment and other resources before, during and after birth. need to be choosier than males to seek a male who will provide healthy offspring and support them.
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impact on mating behaviour - females
preferences of both sexes determine attributes that are passed on - e.g height
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what is intra-sexual selection
selection of ages within sexes ( e.g males competing with other males for mates )
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male strategy - quantity over quality
males do best if they reproduce as frequently as possible. Competition is necessary as female are a limited resource and are choosy. Males who compete successfully pass on their genes to the next generation and therefore those traits are perpetuated
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impact on mating behaviour - males
intra-sexual selection pressures lead to certain patterns of human reproductive behaviour. Male aggression - the most aggressive males are most likely to reproduce. Male preference - for youthful and fertile women because these lead to reproduction
10 of 10
Other cards in this set
Card 2
Front
describe the male sex cells
Back
sperm is small, mobile, and continuously produced from puberty to old age
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