Some diseases are caused by a single defect in a specific gene. These monogenic diseases are often rare, but genetic testing can provide clarity for those affected and their families. This category also includes genes that significantly increase the risk for common diseases.
Carrier screening can identify if parents carry a recessive gene variant that could be passed on to their children, such as for Cystic Fibrosis (CFTR).
Early knowledge about a genetic risk (e.g. BRCA for breast cancer) allows for tight-knit precautionary measures and can save lives.
Genetics is not fate. Knowing your predisposition allows you to get the best out of your biology through a targeted lifestyle.