Genetics plays a significant role in the development of diabetes, particularly in its two main forms: Type 1 and Type 2 diabetes.

1. **Type 1 Diabetes**: This form of diabetes is largely influenced by genetic factors. It is an autoimmune condition where the body's immune system attacks insulin-producing beta cells in the pancreas. Certain genetic markers, particularly in the HLA (human leukocyte antigen) region, are associated with a higher risk of developing Type 1 diabetes. However, environmental factors also contribute, and not everyone with these genetic markers will develop the condition.

2. **Type 2 Diabetes**: Genetics is also a critical factor in Type 2 diabetes, which is more strongly linked to lifestyle and environmental factors. Individuals with a family history of Type 2 diabetes have a higher risk of developing the condition due to inherited genes that affect insulin resistance, glucose metabolism, and fat storage. Other factors, such as obesity and physical inactivity, can interact with genetic predispositions to increase the likelihood of developing Type 2 diabetes.

Overall, while genetics is a key contributor to both forms of diabetes, environmental and lifestyle factors also play essential roles in the onset and progression of the disease.