A genetic test examines the Reference DNA Opens New Window (deoxyribonucleic acid) of a person's cells. Genetic testing can identify abnormal Reference genes Opens New Window, or analyze the number, arrangement, and characteristics of the Reference chromosomes Opens New Window. 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.
|By:||Reference Healthwise Staff||Last Revised: Reference March 29, 2011|
|Medical Review:||Reference Sarah Marshall, MD - Family Medicine
Reference Siobhan M. Dolan, MD, MPH - Reproductive Genetics