The pancreatic beta cells in people with type 2 diabetes are less able to release enough insulin to maintain normal glucose and lipid balance, which is why type 2 diabetes is a condition of relative insulin deficit. Insulin resistance is associated with age, obesity, and less physical activity than normal. The total genetic risk ratio for type 2 diabetes ranges from 2 to 4, which is lower than the risk ratio for type 1 diabetes. The genetic contribution to type 2 diabetes is lower than that of type 1. Genes that are important in type 2 diabetes have been found using genome-wide scanning, with the most promising results occurring on chromosomes 1q21-q24, 2q37, 12q24, and 20. Other linkage areas are now being investigated, and it is possible that in the future novel type 2 diabetes susceptibility genes may be discovered.
While doing research about this topic for personal reasons, I came across these two articles (links below) that I felt explained how diabetes types 1 and 2 can be linked to your genetics. In my opinion, the research being done currently on genes being connected to diabetes is crucial in order to understand the disease even more. There is a large percentage of people in the United States who have diabetes type 1 or type 2, so it is important to understand this disease as much as possible.