2.果蝇是�研人�经常利用的遗传实验材料.果蝇的xy染色体有同源区段和非同源区段其刚毛和截毛为一对相对性状由等位基因aa控制.某�研 Template




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tomski2.果蝇是�研人�经常利用的遗传实验材料.果蝇的xy染色体有同源区段和非同源区段其刚毛和截毛为一对相对性状由等位基因aa控制.某�研 coloring