Why does Down syndrome cause the facial structure to be almost identical regardless of the parents’ genes?

Question

Why does Down syndrome cause the facial structure to be almost identical regardless of the parents’ genes?

In: Biology

Answer 1

Random: When i was really young and saw someone with Down’s Syndrome I remember thinking like wow that first person [with Down’s syndrome] I saw must have a LOT of cousins bc I swear I see someone related to them everywhere I go 😭

(I hope it’s clear the joke is on me here but if this is offensive no worries will take this down)