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Grade 12th passZoology

down’s syndrome is due to
  1. non-disjunction of chromosome
  2. duplication
  3. crossing over
  4. linkkage

Profile image of swayam
11 Years agoGrade 12th pass
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1 Answer

Profile image of Gaurav
11 Years ago
Hello Student
Correct Answer is 1. non-disjunction of chromosome
Down’s Su\yndrome is due to the non-disjunction of 21stchromosome. The individual contains 47 chromosome in the syndrome. It is also known as Trisomy 21