Carrier of genes of colour blindness are pres | vedclass

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(B) The gene for colour blindness is $X$-linked recessive.$A$ male has only one $X$-chromosome $(XY)$,so if he carries the gene,he will be colour blin

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(B) The gene for colour blindness is $X$-linked recessive.$A$ male has only one $X$-chromosome $(XY)$,so if he carries the gene,he will be colour blind.$A$ female has two $X$-chromosomes $(XX)$. If she carries the gene on only one $X$-chromosome,she remains phenotypically normal but acts as a carrier.Therefore,mothers can be carriers of the colour blindness gene,while fathers cannot be carriers.

Carrier of genes of colour blindness are present in

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