NEET 2017 Biology question

A disease caused by an autosomal primary non-disjunction is

(1)Down's syndromeCorrect
(2)Klinefelter's syndrome
(3)Turner's syndrome
(4)Sickle cell anemia

Answer: (1)

Solution

Down's syndrome (trisomy 21) results from non-disjunction of chromosome 21, which is an autosome. Klinefelter's (XXY) and Turner's (XO) syndromes are caused by

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Question ID VK-092142