Final answer:
A genetic disorder is a disease or abnormal condition caused by a mutation in one or more genes. Cystic fibrosis is an example of a genetic disorder caused by a mutation in a single gene.
Step-by-step explanation:
A genetic disorder is a disease, syndrome, or other abnormal condition caused by a mutation in one or more genes or by a chromosomal alteration. An example of a genetic disorder is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.