Physically disabled. Anyone tell me. ?

I'm handicapped on my Right Hand, and with both the legs. It's 40% disability on my body. Will my child have the same thing happened It should be happen I know. Because It's our family genetics. My Father (Little issue but not visible type), Middle uncle (Also have the same problem what I have) and small uncle (No problem) Father has two sons Me and Small brother (brother has No problem) Middle uncle has two sons Big one is no problem and small one is little in his rib cage No problem anywhere else. Small uncle He has one daughter she don't have any problem. Please Anyone tell me. I'm in very fear that If I got married My son or daughter might get the same problem what i have. How to stop this completely Can Anyone tell me.?