Mosaicism is a condition in which cells within the same person have a different genetic makeup. This condition can affect any type of cell, including:
- Blood cells
- Egg and sperm cells (gametes)
- Skin cells
Chromosomal mosaicism; Gonadal mosaicism
Causes, incidence, and risk factors
Mosaicism is caused by an error in cell division very early in the development of the unborn baby.
Examples of mosaicism include:
- Mosaic Down Syndrome
Review Date: 12/01/2010
Reviewed By: Chad Haldeman-Englert, MD, Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.