It is pre diabetic range and needs life style modification counselling.
No,it is not always possible that the disease skips a generation.
Few symptoms are increased thirst, extreme hunger, unexplained weight loss, frequent urination, fatigue, irritability, blurred vision, slow healing wounds and frequent infections. Treatment is either tablets or insulin to control blood sugar levels along with life style modifications (Diet + exercise)
Although Diabetes has few symptoms and signs, most of the times patients would not show any. Hence, any person who has unhealthy habits and other risk factors should be careful in regular monitoring.
Fasting blood sugar of 126 mg/dl or more, post prandial blood sugar of 200 or more with glycated hemoglobin of 6.5% or more.