Genetic testing is a type of medical test that identifies changes in chromosomes, genes, or proteins. The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a person’s chance of developing or passing on a genetic disorder. More than 1,000 genetic tests are currently in use, and more are being developed.
Several methods can be used for genetic testing:
 NIH, Genetic Home Reference, "What is genetic testing" (March 10, 2014).
Roche's DNA Test May Replace Pap Smears
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