A person who is [[heterozygous]] in a recessive genetic disorder.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
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A '''Genetic disease carrier''' is an individual who possesses one copy of a mutant [[allele]] that causes a disease only when two copies are present. Although carriers not affected by the disease, two carriers can produce a child who has the disease.