Colour blindness is

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(A) Colour blindness is a genetic disorder characterized by the inability to distinguish between certain colours,most commonly red and green.$(i)$ It

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Sex-linked recessive disease

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(A) Colour blindness is a genetic disorder characterized by the inability to distinguish between certain colours,most commonly red and green.$(i)$ It is a sex-linked recessive disorder.$(ii)$ It results from a defect in either red or green cone cells of the eye,leading to a failure to discriminate between red and green colours.$(iii)$ The gene responsible for colour blindness is located on the $X$-chromosome.$(iv)$ It is observed more frequently in males $(X^{c}Y)$ because they possess only one $X$-chromosome,whereas females $(XX)$ require two copies of the recessive gene to express the trait.

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