Genetic Test

Test Overview

A genetic test examines a DNA (deoxyribonucleic acid) sample of a person's cells for abnormal genes, or analyzes the number, arrangement, and characteristics of the chromosomes. Testing may be performed on samples of blood, semen, urine, saliva, stool, body tissues, bone, or hair.

You inherit half of your genetic information from your mother and the other half from your father. Genes, alone or in combination, determine what features (genetic traits) a person inherits from his or her parents, such as blood type, hair color, eye color, and other characteristics, including risks of developing certain diseases. Certain changes in genes or chromosomes may cause medical problems.

	Go to top of page	Go to next section
Author:	Maria G. Essig, MS, ELS	Last Updated: April 26, 2007
Medical Review:	Joy Melnikow, MD, MPH - Family Medicine Renee H. Martin, PhD - Medical Genetics
© 1995-2009 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.