system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is alcoholism hereditary?

I've always heard this, but never quite understood it. Are other addictions hereditary? Is it just that addiction itself is hereditary? If my dad was an alcoholic, what will alcohol do to me?
gpt
There is some evidence that people have a genetic predisposition to addiction.  Your dad's brain and body might react a little different to alcohol than everyone else.  Enough that he becomes addicted to it easier than a normal person would.  This genetic trait *could* be passed on to you.

However do no discount the environmental factors.  If you grow up around an alcoholic you may see that as "normal".  There will be easy access to booze around the house meaning you may be more likely to try it younger and more often.