Glossary
Carrier
(KAYR-ee-er)
In genetics, a person who has one copy of a mutated (changed) disease-causing gene but has no symptoms or mild symptoms. Carriers can pass on the mutated gene to a biological child. If a child inherits one mutated copy of a gene from each parent, they will usually show symptoms of the disease or condition.
Definition from the National Cancer Institute’s NCI Dictionary of Cancer Terms.