CUET · BIOLOGY · PYQ PAPER 2023

Which of the following statement is FALSE in relation to colour blindness?

A Colour blindness is an autosome-linked recessive disorder.
B Boys are more likely to be colour blind than girls.
C A daughter will not normally be colour blind, unless her mother is a carrier and her father is colour blind.
D Colour blind people generally fail to discriminate between red and green colour.

Verified Solution

Answer & Solution

Correct Answer

(A) Colour blindness is an autosome-linked recessive disorder.

Step-by-step Solution

Detailed explanation

Colour blindness is an autosome-linked recessive disorder.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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