下图为基因组成为aa的动物在精子形成过程中某时期的示意图下列叙述中正确的是a.2号染色单体上与a相同位置的基因肯定是ab.若姐妹染色单体没 Template




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tomski下图为基因组成为aa的动物在精子形成过程中某时期的示意图下列叙述中正确的是a.2号染色单体上与a相同位置的基因肯定是ab.若姐妹染色单体没 coloring