In humans,recessive genes located on the X-ch | vedclass

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(C) In humans,males have only one $X$-chromosome ($XY$ genotype). Therefore,any recessive gene located on the $X$-chromosome is always expressed in ma

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Expressed in males

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(C) In humans,males have only one $X$-chromosome ($XY$ genotype). Therefore,any recessive gene located on the $X$-chromosome is always expressed in males because there is no corresponding allele on the $Y$-chromosome to mask its effect. This condition is known as 'hemizygous'. In females,due to the presence of two $X$-chromosomes ($XX$ genotype),a recessive gene is expressed only if it is present on both $X$-chromosomes.

In humans,recessive genes located on the $X$-chromosome are always:

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