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Class 12BiologyPrinciples of Inheritance and VariationChromosomal disorders
Medium

Mongolism syndrome is caused by

  • A
    One extra chromosome
  • B
    One extra sex chromosome
  • C
    One extra chromosome in $21^{st}$ pair
  • D
    One less sex chromosome
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Class 12 Questions

Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

Subtopic

Chromosomal disorders

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