homozygote

https://doi.org/10.1351/goldbook.15782
Organism that has the same allelic form of a specified gene on each of a pair of homologous chromosomes or describing the genome of that organism.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1237 [Terms] [Paper]