Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Parental Investment Theory Parental investment theory suggests that the ways in which men and women differ in terms of sexual selection can be explained by their different contributions to the reproductive process. Sexual reproduction involves the fusion of gametes, sperm from the male and an ovum from the female. Ova are about 100 times larger than sperm and it is clear that for each gamete produced, a female makes a heavier investment (in terms of the supply of biomass) than does the male. The female must carry the developing embryo and foetus to full term. Even after birth, the infants of early humans would have been dependant on mother's milk for one or two years. All this adds up to a huge asymmetry in the parental investment each sex makes in the rearing of offspring, and this has left its mark on the mating strategies employed by human males and...

Get instant access

• Instant, unlimited access to our documents in full
• Swap your work for free access, or pay £4.99
• To see the full version of this document and 146,871 others

OR

Receive email updates for this category

• Simply tell us your email address and receive a weekly Study Help Email for FREE
• Receive 3 FREE essay views with each email
• Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk