manifesting carrier

man·i·fest·ing het·er·o·zy·gote

an organism heterozygous for what is ordinarily a recessive condition that, as a result of special mechanisms (such as lyonization, allelic exclusion, or a deletion in the homologous chromosome), has phenotypic manifestations. Synonym(s): manifesting carrier

manifesting carrier

A term of art for a person—typically a woman—who is a heterozygous carrier of a gene, the mutation of which is fully expressed in males (e.g., DMD, the gene defective in Duchenne muscular dystrophy), and who has partial expression of the defective gene (e.g., camptocormia).