Is it normal i think smoking ruined my family's genetics?
I am a descendent from 4 generations of heavy smokers. I know from my grandmother that her grandmother (my great-great) was a heavy smoker.
Anyways my great-grandmother was a heavy smoker and live to 93 with little health issues. Her two children now have Alzheimers which started at 67, 71 respectively. Alzheimers isn't known to run in my family, granted the 2 of them never took care of their health, but I don't understand how their mother lived to be 93 and with no memory issues, and she was overweight (unlike her children).
My mom has an auto-immune disorder that isn't genetic, she smokes a pack a day as well. My mom confessed to smoking while pregnant and my sister was premature and has Asthma, and I'm usually short, Autistic, and have hypotonia. None of our issues are genetic, so I can theorize our devolution is from our parents smoking. Afterall the chemicals in tobacco can alter your DNA. With this knowledge, I won't have children and will never touch a cigarette.