Hello and welcome to MedHelp's forums. We appreciate your question and taking the time to post. Diabetes 1 and 2 are both linked to a genetic predisposition to develop them. However, other factors will play a role. They've done studies with identical twins in which one has diabetes and the other does not. If your twin has type 2 diabetes though which would indicate you have a genetic predisposition, the chance of developing it yourself is 3 in 4 times. Here's some information on genes and diabetes. http://www.diabetes.org/diabetes-basics/genetics-of-diabetes.html.
Please always get regular physicals and check with your doctor for more information. We wish you the best of health
What you eat can play a part in developing diabetes. The Pima Native Americans of S.W. US developed a propensity for diabetes once they started eating the Standard American Diet.