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 an extra copy of chromosome 21 (trisomy 21), which is a chromosomal abnormality. People with Down syndrome are usually shorter than average, not taller. It is a genetic condition that occurs randomly during the formation of reproductive cells (not passed like a typical genetic trait to siblings in the way a simple genetic disorder might be passed in a Mendelian sense). And it cannot be prevented by exercise and a healthy diet as it is a chromosomal - level issue.

Answer:

It is a chromosomal abnormality.