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![]() ![]() 人氣:17746![]() ![]() ![]() |
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男人絕種?!之一
今日的"BIO" lecture之後,去了圖書館。找了一些scientific paper。結果︰4:30才找到!!不過,看看內容,覺得值得! 男和女的比率在modal probability來說是一比一,但實際上不是。除了random error 一些statistical error之外,也有biological problem。 Graves, JM. 2006. Sex chromosome specialization and degeneration in mammals : cell 124 (10 March). 中學生都應該知道,男性是有XY的染色體。"y chromosome seems to be a product of a perverse evolutionary process that does not select the fittest y, which may cause its degradation and ultimate extinction." " this theory is supported by comparative studies in insects and vertebrates including mammals" ( Graves 2006).
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