NEET Biology question

Hemophilia is more common in males because it is a

(A)Recessive character carried by Y-chromosome
(B)Dominant character carried by Y-chromosome
(C)Dominant trait carried by X-chromosome
(D)Recessive trait carried by X-chromosomeCorrect

Answer: (D)

Solution

Haemophilia is caused by a recessive allele located on the X-chromosome. Since males are hemizygous (only one X), a single copy of the recessive allele () is sufficient to cause the disease, whereas females need two copies () to be affected, making the

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Question ID VK-120175