Red-green colourblindness is a sex-linked trait. Which of the given statements is not correct regarding colourblindness?

It is more common in males than in females.

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Homozygous recessive condition is required for the expression of colourblindness in females.

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Males can be carriers of the trait.

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Colourblind women always have colourblind father and always produce colourblind son.

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Solution

The correct option is D Males can be carriers of the trait.
Since colourblindness is a sex-linked recessive trait and males just have one X chromosome, they can never be the carriers. Males will always express the disease/phenotype.
So, the correct answer is (C).

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Red-green colourblindness is a sex-linked trait. Which of the given statements is not correct regarding colourblindness?

The correct option is D Males can be carriers of the trait.Since colourblindness is a sex-linked recessive trait and males just have one X chromosome, they can never be the carriers. Males will always express the disease/phenotype. So, the correct answer is (C).

The correct option is D Males can be carriers of the trait.
Since colourblindness is a sex-linked recessive trait and males just have one X chromosome, they can never be the carriers. Males will always express the disease/phenotype.
So, the correct answer is (C).