JS Genetics LLC, spun out of Yale University Medical School laboratories, develops and markets accurate, convenient and cost effective DNA diagnostic tests for underserved medical conditions in newborns and adolescents. The DNA tests are done using a pyrosequencing-based approach and are focused on three key areas of developmental disorders: Physical Development tests (Turner Syndrome, Klinefelter Syndrome & Downâs Syndrome), Cogneitive Development tests (Dyslexia & Klinefelter Syndrome) and Behavioral Development tests (Fragile X Syndrome & Klinefelter Syndrome).