Question

An extra chromosome is known as a trisomy and one less chromosome is known as a monosomy. Why are these good words for a disorder with extra or missing chromosomes (look at the root words)?​

Answer 1

prefix meaning for "mono" means "one and "tri" means three

These are good words for a disorder missing a chromosome (mono) or having an extra (tri) since it is litterally telling you it either has 3 or 1 chromosome