| http://www.w3.org/ns/prov#value | - They envision sperm as a kind of parasitic DNA that hijacks the egg to make it do all the work to look after its DNA. The trade-off for the female is that she gets the genetic diversity which comes from the male DNA. In situations where the male puts more effort into raising the young, particularly with birds where the male can protect the eggs, the males are less interested in frequent copulation
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