NEET Biology question

A person having 45 chromosomes and Y-chromosome absent. Is suffering from

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

Answer: (C)

Solution

A person with only 45 chromosomes, having a single X and no Y-chromosome (karyotype 45,X), has Turner's syndrome, matching option (c); Down's syndrome involves 47 chromosomes (trisomy 21),

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Question ID VK-119664