1 gene, 1 disease no more – acknowledging the full complexity of genetics could improve and personalize medicine

Genetic inheritance may sound straightforward: One gene causes one trait or a specific illness. When doctors use genetics, it’s usually to try to identify a disease-causing gene to help guide diagnosis and treatment. But for most health conditions, the genetics is far more complicated than how clinicians are currently looking at it in diagnosis, counseling and treatment.

Your DNA carries millions of genetic variants you inherit from your parents or develop by chance. Some are common…