A sex-limited trait is limited to only one sex due to anatomical differences. Such trait affects a structure or fuction of the body present in only males or only females. These traits may be controlled by sex-linked or autosomal genes. Genes for milk yield in dairy cattle affect only cows. Similarly beard growth in humans is limited to men. A woman does not grow a bread herself but she can pass the genes specifying heavy beard growth to her sons.
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