在某种牛中基因为 aa 的个体的体色是红褐色的aa 为红色的基因型为 aa 的个体中.雄牛是红褐色的而雌牛则为红色一头红褐色的母牛生 Template




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tomski在某种牛中基因为 aa 的个体的体色是红褐色的aa coloring