MHT CET Biology question

Colour blindness is found more in males than in females because [MP PMT 1992]

(A)The males containing the single affected X-chromosome are colour blindCorrect
(B)Heterozygous females are colour blind
(C)Males having affected Y-chromosome are colour blind
(D)Affected X-chromosome has much high affinity to Y-chromosome as compared to unaffected X-chromosome

Answer: (A)

Solution

The gene is recessive and X-linked, so a male with a single affected X is colourblind (hemizygous) while a female needs two affected X

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Question ID VK-059299