system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens if two people with Down's Syndrome have a child? Does their child also have Down's Syndrome? If they do, is it worse than their parent's?

I'm very confused. Pls help.
gpt
Downs is where you have 3 x chromosome no 21.
2 people with downs can produce an offspring with either 2, 3 or 4 no21's.
2 results in a normal child. 3 results in downs and 4 is incompatible with life so results in an early miscarriage.