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JIPMER 2004
Exam
JIPMER
Year
2004
Subject
Zoology
Chapter
Principles of Inheritance and Variation

JIPMER 2004 · Zoology · Principles of Inheritance and Variation

A person who is trisomic for twenty first pair of chromosome...

A person who is trisomic for twenty first pair of chromosome suffers from

Options

  1. AKlinefelter's syndrome
  2. BDown's syndrome
  3. CTurner's syndrome
  4. DNone of the above

Correct answer

B. Down's syndrome

Step-by-step solution

Down's syndrome (45+XX(45+\mathrm{XX} or 45+XY)45+\mathrm{XY}) is the case when there is one extra chromosome in 21st pair of autosome. It is also called trisomy 21 or trisomy-G. It is most common in children of over aged mothers (above 41 years). It is also called Mongolian syndrome.
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