Is familial hypercholesterolaemia hereditary?

Yes it is: The traditional model is one called autosomal co-dominant , meaning that if a parent has a single gene for this condition there is a 50% chance it will be passes to a child . The disease is expressed by the presence of only one gene causing a less severe form of high cholesterol elevation called heterozygous fh . If both parents pass a gene to a child then they have the severe form of the disease.