Trisomies and Monosomies

Also known as: chromosomal abnormalities, numerical abnormalities, human chromosomal disorders.

What are trisomies and monosomies?

Trisomies and monosomies are two types of chromosomal abnormalities. Specifically, a trisomy is when a person has three of a particular chromosome, instead of the usual two. A monosomy is when they just have one chromosome instead of the usual two.

What causes trisomies and monosomies?

Trisomies and monosomies are the result of changes in chromosomes division before conception.

Occasionally trisomies can pass from one generation to the next, but they usually occur randomly.


What are the symptoms of trisomies and monosomies?

Symptoms of trisomies and monosomies can vary widely depending on the chromosome that is affected. The most well-known trisomy is trisomy 21, or Down syndrome. Common symptoms may include several facial and physical features, development and intellectual delays, muscle weakness and many other symptoms.

What are trisomies and monosomies care options?

Treatments are focused on therapies to help children live the best lives possible with the condition.

Reviewed by: Mislen S Bauer, MD

This page was last updated on: January 03, 2022 04:30 PM