一个X是从父亲来的,另一个从母亲来,所以都是50%
所有跟帖:
• 她说的大约是基因数,因为Y小,上面基因不多 -时来运砖- ♂ (0 bytes) () 02/25/2016 postreply 10:29:47
• 她说的大约是基因数,因为Y小,上面基因不多 -时来运砖- ♂ (0 bytes) () 02/25/2016 postreply 10:29:47
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