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​Genetic Testing

updated: January 18, 2025

Definition

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Genetic testing is the use of a laboratory test to examine an individual’s DNA for variations, typically performed in the context of medical care, ancestry studies or forensics. In a medical setting, the results of a genetic test can be used to confirm or rule out a suspected genetic disease. Results may also be used to determine the likelihood of parents passing on a genetic mutation to their offspring. Genetic testing may be performed prenatally or after birth. Genetic testing is also used to study the genomes of tumors in cancer cases.



Narration

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Genetic testing. Genetic testing can be a powerful diagnostic and predictive tool that can help people understand more about the biological basis of a health condition they may already have or may be at an increased risk to develop in the future.

Julie Sapp
Julie C. Sapp, Sc.M., C.G.C.

Genetic Counselor

Precision Genomics Section