NEET Biology question

'Cri-du-chat' syndrome in humans is caused by the

(A)Fertilization of an XX egg by a normal Y-bearing sperm
(B)Loss of half of the short arm of chromosome 5Correct
(C)Loss of half of the long arm of chromosome 5
(D)Trisomy of 21st chromosome

Answer: (B)

Solution

Cri-du-chat syndrome results from a conspicuous deletion of about half of the short arm of chromosome 5, producing severely impaired development and a characteristic cat-like cry in affected infants (the origin of the syndrome's name). Fertilization abnormalities

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Question ID VK-119783