Final answer:
Familial hypercholesterolemia is a true genetic condition that results in extremely high cholesterol levels in the blood, leading to increased risk of tendon xanthomas, xanthelasma, and cardiovascular disease.
Step-by-step explanation:
True, familial hypercholesterolemia (FH) is a condition characterized by extremely high levels of cholesterol in the blood. It is often caused by a mutation in the LDL receptor gene on chromosome 19 or the ApoB gene, which affects how the body processes cholesterol. This genetic disorder leads to an increased risk of tendon xanthoma, xanthelasma, and premature cardiovascular disease due to the buildup of cholesterol in the arteries, a condition known as atherosclerosis.