From life-altering genetic conditions to promising new treatments, here's what you need to know about 7 inherited diseases ...

Over time, researchers' knowledge of the genetic risk factors for disease has become more comprehensive, and this has made it possible to apply GWAS research to risk assessments for various disorders.

"Medical Journeys" chart a path each step of the way ... the one encoding ApoE4 is the strongest genetic predictor of Alzheimer's disease risk. It is found in 40-60% of Alzheimer's patients.

Scientists have identified novel genetic interactions that may contribute to congenital heart disease (CHD), a common birth defect.