It could be as simple as the same reason men have nipples - a feature of one sex carries over tothe other because the repercussions of expressing the gene in the sex that doesn't need it are less disastrous than the risk of not expressing it in the s
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It could be as simple as the same reason men have nipples - a feature of one sex carries over tothe other because the repercussions of expressing the gene in the sex that doesn't need it are less disastrous than the risk of not expressing it in the s
It could be as simple as the same reason men have nipples - a feature of one sex carries over to
the other because the repercussions of expressing the gene in the sex that doesn't need it are less disastrous than the risk of not expressing it in the sex that needs it.连着上面
It could be as simple as the same reason men have nipples - a feature of one sex carries over tothe other because the repercussions of expressing the gene in the sex that doesn't need it are less disastrous than the risk of not expressing it in the s
它可能是这么简单,同样的理由男人拥有乳头-一个性别的特征带,因为反弹到另一个表达的基因性也不需要较少灾难性的风险并不表达它的性需要它
我晕了，真得晕了。