NEET Biology question

Genes for colour blindness is carried by I. Abnormal development; II. Father; III. Mother; IV. Autosomes.

(A)I and II
(B)II and IIICorrect
(C)III and I
(D)I and IV

Answer: (B)

Solution

Colour blindness is a sex-linked recessive disease, with the defective gene carried on the X chromosome; a colourblind individual's defective gene allele may have been inherited from either the father (who would himself be colourblind, as he is hemizygous) or the

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Question ID VK-120096