1. an organism having two identical alleles of a particular gene or genes
Usage: biology; genetics

Examples

• A homozygote for brown eyes has two copies of the brown eye allele.
• The plant was a homozygote for the recessive trait.
• Genetic testing revealed that she was a homozygote for the disease-causing mutation.
• In Mendel’s experiments, homozygotes bred true for their traits.
• The laboratory mice were homozygotes for the knockout gene.
• A homozygote dominant individual will always express the dominant phenotype.