The most common form of Down syndrome is known as Trisomy 21,
which is when chromosome number 21 receives an extra copy through
nondisjunction. This leads to each cell having a total of 47
chromosomes, and while people living with Down syndrome lead long,
happy lives, they can experience abnormalities in their physical
growth, cognitive capabilities, and are sometimes at greater risk
in terms of health.
Which cell checkpoint in the cell cycle would need to
malfunction for nondisjunction to...