Hello Doctor.. My Son's Aged 4yrs 10 Months.... From Last

Hello Doctor.. My son's Aged 4yrs 10 months.... From last 1-2 weeks i noted the symptoms of diabetes to my son, like -Frequent urination, Excessive thirst, Increased hunger, Weight loss, Tiredness. So i take fasting test of him that was 110 (that is deadline) ..... i was shocked.... My mother also was diabetes patient but now she is no more... Doctor is that genetic or his (my son's) diet habit... please Doctor help me what i have to do now??