MHT CET Biology question

More men suffer from colorblindness than women because

(A)Women are more resistant to disease than men
(B)The male sex hormone testosterone causes the disease
(C)The colorblind gene is carried on the 'Y' chromosome
(D)Men are hemizygous and one defective gene is enough to make them colorblindCorrect

Answer: (D)

Solution

The recessive gene is on X; males have one X and so a single allele is expressed, whereas females need two

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Question ID VK-059487