each male has one X chromosome - so he still has "乳房"

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送交者: yell 于 2008-03-05, 21:17:55:

回答: 进化论是怎么解释男性还有的乳房？会渐渐进化消失掉吗？ 由 粪青 于 2008-03-05, 19:48:47:

female has two X chromosomes, so she has a bigger "乳房"

As you can see, male's "乳房" cannot be removed by "进化"!!!

my very *non-scientific* explanation.



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