NEET Biology question

Red-green colour blindness is a sex-linked trait. Which of the given statements is NOT correct regarding colour blindness?

(A)It is more common in males than in females
(B)Homozygous recessive condition is required for the expression of colour blindness in females
(C)Males can be carriers of the traitCorrect
(D)Colour-blind women always have a colour-blind father and always produce colour-blind sons

Answer: (C)

Solution

Since colour blindness is X-linked recessive and males possess only a single X chromosome (hemizygous), a male either has the recessive allele and is affected, or does not and is unaffected — there is no possible masked

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Question ID VK-120370