The main impact of paternal consumption of alcohol (i. e., father's drinking) on a child involves the fact that fathers who drink tend to have

Parents that drink alcohol can have serious abusive and negligent tendencies towards their children, which can cause the child to become extremely fearful of and sadly might even replicate/justify the actions of that parent.

When parents drink and/or do drugs, they'll most likely become like their parents because a child looks up to his/her parent. Because this is their role model, they look up to them. Unfortunately, this is what kids usually do if they have this happen in their daily lives. :(