Hemochromatosis is a condition in which too much iron builds up in the body. When people inherit the condition via their genes, it can be heterozygous or homozygous. “Heterozygous” means the person ...

Some types of sickle cell disease cause severe illness, while others have a mild or unapparent course. Sickle cell disease is present from birth and inherited from genes you receive from your parents.

Homozygous, or homozygosity, refers to the inheritance of genes from each biological parent. Inheriting faulty genes from both parents can cause a person to develop the associated condition. Genetic ...