下列有关生物遗传变异和进化的叙述合理的有a姐妹染色体相同位置上分别是a和a基因这意�着�生了基因突变b基因类型没有变化不可能产生可遗传 Template




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tomski下列有关生物遗传变异和进化的叙述合理的有a姐妹染色体相同位置上分别是a和a基因这意�着�生了基因突变b基因类型没有变化不可能产生可遗传 coloring