牛的毛色有�色和棕色如果两头�牛交配生出一头棕色小牛请回答.1�色和棕色哪种是显性性状 .2如果用b与b分别表示牛毛色基因的显性和 Template




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tomski牛的毛色有�色和棕色如果两头�牛交配生出一头棕色小牛请回答.1�色和棕色哪种是显性性状 .2如果用b与b分别表示牛毛色基因的显性和 coloring