Since diabetes runs in your family you have a high risk of inheriting their diabetes gene. Researchers know from studying family histories that you can inherit a
risk for
Type 2 diabetes. And, yes, a type 2 gene can bypass your siblings and you get stuck with it - It happens. What also happens is you subconsciously picked up your parents bad habits that led to their diabetes. Bottom line, go get tested - an A1c, OGTT, and/or a fasting glucose test.