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hardMCQNEET 20172026Biology
4 marks (โˆ’1)

A disease caused by an autosomal primary non-disjunction is:

  1. A
    Down's syndrome
  2. B
    Klinefelter's syndrome
  3. C
    Turner's syndrome
  4. D
    Sickle cell anemia

Solution & Step-by-step Explanation

Down's syndrome is caused by the non-disjunction of the 21st pair of autosomes during gamete formation, resulting in trisomy 21 (47 chromosomes). Klinefelter's and Turner's involve sex chromosomes.

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A disease caused by an autosomal primary non-disjunction is:
A
Down's syndrome
B
Klinefelter's syndrome
C
Turner's syndrome
D
Sickle cell anemia

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