NEET 2006 Biology question

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

(1)Fertilization of an XX egg by a normal Y-bearing sperm
(2)Loss of half of the short arm of chromosome 5Correct
(3)Loss of half of the long arm of chromosome 5
(4)Trisomy of 21st chromosome

Answer: (2)

Solution

Cri-du-chat ('cry of the cat') syndrome is a chromosomal deletion disorder caused by loss (deletion) of part of the short (p) arm of chromosome 5; the affected infant has a cat-like cry, small head and mental

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Question ID VK-089710