Why does having a extra or one less chromosome have such an impact on the body

Question

Why does having a extra or one less chromosome have such an impact on the body

In: 4

Answer 1

Chromosomes are responsible for your genetic code, thus they are also responsible for your looks.
When you have an additional chromosome it messes up your genetic code, and causes physical and mental disproportions.

Edit: I’ve brought this off of a quick Google research and it was a pretty interesting read, thanks for encouraging me to look it up