如何在解答生物减数分裂的选择提示准确判断染色体数、基因数等等?????
回复(4) 2009-08-24 17:08 来自版块 - 
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JOOSEHYUK 默!(2009-08-25 20:40)
JOOSEHYUKthank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(2009-08-25 20:39)
yuan565867626染色体 DNA 间期 2N 2N-----4N 减 前 2N 4N ...(2009-08-25 17:44)
ASD1234567890 (2009-08-24 18:53)

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