X-linked recessive gene is ...... . | vedclass

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Question

(A) $X$-linked recessive traits are genes located on the $X$ chromosome that express their phenotype only when the dominant allele is absent. In males

Vedclass · Accepted Answer

Always expressed in males

Vedclass · Answer

(A) $X$-linked recessive traits are genes located on the $X$ chromosome that express their phenotype only when the dominant allele is absent. In males,who have only one $X$ chromosome $(XY)$,a single copy of the recessive gene is sufficient to express the trait because there is no corresponding allele on the $Y$ chromosome to mask it. Therefore,$X$-linked recessive genes are always expressed in males if they inherit the affected $X$ chromosome from their mother.

$X$-linked recessive gene is ...... .

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