An individual having different alleles at one or more loci regarding a specific character.
https://www.medg.fr/hypercholesterolemie-familiale-heterozygote 2018 France teaching material scientific and technical information heterozygote Hypercholesterolemia familial hypercholesterolemia hyperlipoproteinemia type ii heterozygote high serum cholesterol, familial high serum cholesterol, familial
--- https://www.sfendocrino.org/_images/mediatheque/articles/pdf/Gueritee/Guer2017/2_bruckert%20v2.pdf 2017 France scientific and technical information heterozygote high serum cholesterol, familial hospitals, proprietary high serum cholesterol, familial heterozygote familial hypercholesterolemia endocrinology hyperlipoproteinemia type ii