We can’t always test everyone’s genes to see where the gene variants are, and sometimes brand new gene variants show up in a family, affecting only one person. But conditions can seem to “skip a generation,” too, and that’s where a family health portrait comes in.
Family members share genes, habits, lifestyles, and surroundings.
Genetics helps explain what makes you unique, why family members look alike, and why some diseases run in families.
Many conditions are caused by one or more genes that do not work correctly in the body.