[nq:1]From a recent article in the New York Times: 'How the functioning of X chromosomes differs in women and men ... [/nq] If they could find out what the genes are for, which is work in progress: done for some genes, but not others. Keeping it really simple, classical genetics would say that, for example, if your father had a big nose and your mother had a small nose, you wouldn't have a medium-sized nose.
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