NEET 1992 · Class 12

Principles of Inheritance and Variation

In human beings, 45 chromosomes/single X/XO abnormality causes

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

0, emb=0.6024, combined=0.7614). Verified: high — The span explicitly states 'In Turner's syndrome, one X chromosome is missing and the sex chromosome is as XO', which directly matches the MCQ's description of '45 chromosomes/single X/XO abnormality' and identifies it as Turner's syndrome.

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