Tuesday, October 25, 2011

Why are women always smaller than men?


I looked small? or I AM small?

or is his jacket large enough to be my dress?

LOL. Now here comes a question, why women are always smaller than men? Well, i dont have the answer but i did found something. =)




-Why are women smaller than men? When anthropology meets evolutionary biology-

Priscille Touraille and Pierre-Henri Gouyon

Abstract:

There are large variations of size among humans but in all populations, men are larger on average than women. For most biologists this fact can be easily explained by the same processes that explain the  size dimorphism in large mammals in general and in apes in particular. Due to fights between males for the possession of females, sexual selection has favoured bigger males. Indeed, this factor certainly explains why males are selected for being large but lets aside the question of selection on the female side. Actually, it has been shown that larger females are also favoured by natural selection. This is particularly relevant for women because their probability of dying when giving birth is then reduced. The common view that size dimorphism in  humans results from the fact that the advantage of being big is  stronger for men than for women is challenged by another hypothesis, namely that the difference results from a difference of cost rather than from a difference of benefits. The cost of being big would be higher in women simply because, under gender hierarchical regimes found in all cultures, men are allocated the best food. The interaction between evolutionary forces and cultural practices could then lead to this disadaptive situation. 




The link to the full article, readers please help yourself.   =)

--> Why are women smaller than men? When anthropology meets evolutionary biology

Another random post. Cheers~

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