Skip to main content
An official website of the United States government
Español

heterozygous genotype

(HEH-teh-roh-ZY-gus JEE-noh-tipe)
The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
Search NCI's Dictionary of Genetics Terms