牛的毛色有�色和棕色如果两头�牛交配产生了一头棕色子牛请回答1�色和棕色哪种毛色是显性性状 2若用b与b表示牛毛色的显性 Template




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tomski牛的毛色有�色和棕色如果两头�牛交配产生了一头棕色子牛请回答1�色和棕色哪种毛色是显性性状 2若用b与b表示牛毛色的显性 coloring