0 a homozygous person, animal, or organism (= having two of the same form of cell material that controls a particular characteristic and so able to pass on only that form to his, her, or its young):
The intervention can turn a heterozygote into a homozygote.
Studies provided evidence that both types of carriers - homozygotes and heterozygotes - can show potential markers of neurodegeneration.
Both my parents are homozygotes for the European variant of the gene.
