| homozygous | Containing two copies of the same allele. Compare: heterozygous (09 Oct 1997) |
|---|---|
| homozygous achondroplasia | A severe achondroplasia affecting progeny of two achondroplastic parents; usually fatal in the first year of life. (05 Mar 2000) |
| homozygous by descent | Possessing two genes at a given locus that are descended from a single source, as may occur in consanguineous mating. (05 Mar 2000) |