Question

For down syndrome, at which stages of meiosis 1 and 2 could a mistake occur that could result in the altered chromosome number?

Answer 1

Anaphase

Explanation:

Down Syndrome (or Trisomy 21) is caused by an nondisjunction, which would cause the individual to have 47 chromosomes. This occurs at anaphase since that is when the chromosome pairs along the equator are split.