鸡冠有两种性状玫�冠和单冠.如果亲代个体都为玫�冠后代个体有玫�冠和单冠用r表示显性基因r表示隐性基因.则以下叙述正确的是 A Template




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tomski鸡冠有两种性状玫�冠和单冠.如果亲代个体都为玫�冠后代个体有玫�冠和单冠用r表示显性基因r表示隐性基因.则以下叙述正确的是 a coloring