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JIPMER2018ZoologyPrinciples of Inheritance and Variation

Non-disjunction in meiosis results in

Options

  1. Atrisomy
  2. Bnormal diploid
  3. Cgene mutation
  4. DNone of these

Correct answer

A. trisomy

Step-by-step solution

Non-disjunction in meiosis results in trisomy, i.e. the presence of an extra chromosome. Such individuals have 47 chromosomes instead of 46 . Some examples of such abnormalities include Down's syndrome (21-trisomy), Patau's syndrome (13-trisomy) and Edward's syndrome (18-trisomy).

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