Multiple choice

The reason of trisomy in Down's syndrome is

  1. diploidy

  2. non-disjunction

  3. triploidy

  4. transfer

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Down's syndrome is a trisomic condition on the 21st chromosome which is the result of non disjunction, i.e. failure of synapsed homologous chromosomes to separate during anaphase-I of meiosis.