sentences:  Although genetic markers for Type 1 Diabetes have been identified, genetic predisposition is not the only factor in development of the disease.An increasing body of evidence, including rising rates of T1D diagnosis and incomplete penetrance of the disease in genetically predisposed individuals, suggests that environment may play an equally important role.TEDDY researchers hypothesize that a range of environmental factors have the ability to influence both the initial development of pancreatic beta-cell autoimmunity and the ultimate progression from autoimmunity to diabetes.