The recessive genes located on the X-chromoso | vedclass

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(C) In humans,males have one $X$-chromosome and one $Y$-chromosome $(XY)$,while females have two $X$-chromosomes $(XX)$.Because males have only one $X

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Expressed in males

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(C) In humans,males have one $X$-chromosome and one $Y$-chromosome $(XY)$,while females have two $X$-chromosomes $(XX)$.Because males have only one $X$-chromosome,they are hemizygous for any gene located on it.Therefore,any recessive gene present on the $X$-chromosome in males will be expressed because there is no corresponding allele on the $Y$-chromosome to mask its effect.In contrast,females can be heterozygous,where the dominant allele on one $X$-chromosome masks the recessive allele on the other.

The recessive genes located on the $X$-chromosome in humans are always:

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