Question

which statement describes down syndrome?
it is a chromosomal abnormality.
it causes individuals to be taller than average.
it can be passed to other siblings.
it is preventable by exercise and a healthy diet.

Explanation:

Down syndrome is caused by the presence of an extra copy of chromosome 21, making it a chromosomal abnormality. It does not cause taller - than - average stature, is not passed to siblings in the way described, and is not preventable by exercise and a healthy diet.

Answer:

It is a chromosomal abnormality.