55.mm和nn分别表示某动物的两对同源染色体aa和bb分别表示等位基因基因与染色体的位置如右图所示下面对精巢中部分细胞的分裂 Template




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tomski55.mm和nn分别表示某动物的两对同源染色体aa和bb分别表示等位基因基因与染色体的位置如右图所示下面对精巢中部分细胞的分裂 coloring