NEET 1995 · Class 12

Principles of Inheritance and Variation

An abnormal human male phenotype involving an extra X-chromosome (XXY) is a case of

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

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=0.5665, combined=0.6399). Verified: high — The span explicitly states that Klinefelter's syndrome involves the XXY chromosomal condition, which directly matches the MCQ's description of an abnormal human male phenotype with an extra X-chromosome.

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