1. The condition of having two copies of a particular chromosome instead of the normal pair, or the presence of two copies of a chromosome in a cell or organism.
Usage: genetics; medical

Examples

• Disomy of chromosome 21 is the normal condition in most human cells.
• Uniparental disomy occurs when both copies of a chromosome come from the same parent.
• The geneticist explained that disomy is the typical chromosomal state for diploid organisms.
• Certain genetic disorders result from uniparental disomy rather than standard inheritance patterns.