Final answer:
The centromere of human chromosome 15, which creates a long arm and a very short arm, classifies it as acrocentric.
Step-by-step explanation:
The centromere position on a chromosome determines the type of chromosome based on the lengths of its arms. For human chromosome 15, which has a long arm (q) and a very short arm (p), the classification depends on where the centromere is situated in relation to these arms. Since human chromosome 15 has a centromere that creates a much shorter p arm in comparison to the q arm, it is classified as acrocentric.
Chromosomes that have nearly equal arm lengths are metacentric, those with slightly off-center centromeres creating arms of unequal lengths but not extremely disproportionate are submetacentric, and chromosomes with the centromere at one end forming one very long arm and no other arm are telocentric.