noun
- an organism or cell having one chromosome in addition to the usual diploid number
Usage: biology; genetics
Examples
- Down syndrome is caused by a trisome of chromosome 21.
- The genetic counselor explained that the fetus was a trisome.
- Researchers studied the effects of trisome conditions on development.
- A trisome occurs when there are three copies of a particular chromosome instead of two.
- The laboratory confirmed the presence of a trisome in the cell sample.
- Trisome disorders can lead to various developmental abnormalities.