NEET 1996 · Class 12

Principles of Inheritance and Variation

In which of the following diseases, the man has an extra X-chromosome?

  1. (A)Turner's syndrome
  2. (B)Klinefelter's syndrome
  3. (C)Down's syndrome
  4. (D)Haemophilia

The NCERT line that answers it

Verbatim line

In Turner's syndrome, one X chromosome is missing and the sex chromosome is as XO, and in Klinefelter's syndrome, the condition is XXY.

Chapter
Principles of Inheritance and Variation
Section
4.8.3 Chromosomal Disorders
Page
27
Words matched
15 of 23

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

75, emb=0.5467, combined=0.628). Verified: high — The span explicitly states 'in Klinefelter's syndrome, the condition is XXY', which directly indicates an extra X chromosome in males, matching the MCQ's correct answer.

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Question text is reproduced from the published NEET 1996 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.