Hereditary hemochromatosis is a genetic disorder. It is passed from a parent to a child (inherited). Most people who have hemochromatosis inherit defective genes from both parents. In rare cases, a person can have hemochromatosis by inheriting defective genes from just one parent.

A person who has inherited only one defective gene will most likely be a carrier of hemochromatosis and will not have the disease. A carrier can pass the defective gene on to his or her children.

• If only one parent is a carrier of a defective gene, the child will not have hemochromatosis; however, there is a 50% chance that the child will be a carrier.
• If both parents are carriers, there is only a 25% chance that the child will have hemochromatosis, but a 50% chance that the child will be a carrier.