NEET Biology question

21 trisomy in humans causes

(A)Klinefelter's syndrome
(B)Down's syndromeCorrect
(C)Turner's syndrome
(D)Patau's syndrome

Answer: (B)

Solution

Down's syndrome is caused by trisomy of chromosome 21 (an extra copy of autosome 21, giving 47 chromosomes total), producing characteristic features such as a Mongolian eye-fold, partially open mouth with a furrowed, protruding tongue, a broad palm with a characteristic

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Question ID VK-120069