A man and a woman do not show any apparent ge | vedclass

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(D) $1$. The parents are unaffected,but they have affected offspring,which indicates that the trait is recessive.$2$. The disease appears only in sons

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Sex-linked recessive

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(D) $1$. The parents are unaffected,but they have affected offspring,which indicates that the trait is recessive.$2$. The disease appears only in sons ($5$ sons,$3$ affected) and not in daughters ($2$ daughters,$0$ affected).$3$. This pattern of inheritance,where the trait skips a generation and affects primarily males,is characteristic of $X$-linked recessive inheritance.$4$. In $X$-linked recessive inheritance,the mother is a carrier $(X^CX)$ and the father is unaffected $(XY)$. The sons inherit the $Y$ chromosome from the father and the $X$ chromosome from the mother. If the mother passes the affected $X$ chromosome to her son,he will express the disease.

$A$ man and a woman do not show any apparent genetic disease. They have $7$ children ($2$ daughters and $5$ sons). Three sons suffer from the given disease,but none of the daughters are affected. Which pattern of inheritance can you suggest for this disease?

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