Describe The Evolutionary Approach To Explain Pare

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Describe the evolutionary approach to explain parental investment in humans; sex differences, parent-offspring conflict. Firstly females’ initial investment is far greater than that of males. This is because the eggs of a female are less numerous and more costly physiologically to produce then male sperm. Furthermore a female can only produce a limited number of offspring where as men can produce virtually an unlimited amount. Males and females both compete for different things; males want quantity so they can increase the size of their gene pool whereas females want quality in their males and them to provide good resources. As well as this women tend invest more in their offspring because they are guaranteed to be the offspring’s mother whereas males are not. The same goes for grandparents. Grandmothers will invest more in their grandchild because they know that they are guaranteed to be their grandmother. Whereas grand fathers are far less likely to invest because not only might they not be the father of their son but their son might not be the father of the new offspring. Child rearing for women comes at a high expense. They have to care for the child for a minimum of nine months and then they are relied up on by the child after the birth for demands such as breast feeding. Therefore females not only make the greater parental contribution but also the largest postnatal contribution. Random mating is therefore so much more costly for women compared to men. Men contribute their sperm and after that they are not as obliged to stick around and look after the baby. Males are able to opt out of parental investment whereas females can’t. When males do invest in the offspring they are under pressure not to invest their time and resources in another man’s child. They therefore try to ensure that their care is not misdirected towards non relatives through
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