What Is A Genetic Predisposition?
A genetic predisposition (sometimes also called genetic susceptibility) is an increased likelihood of developing a particular disease based on a person’s genetic makeup. A genetic predisposition results from specific genetic variations that are often inherited from a parent. Read More Here….
To answer your query, to become addicted to drugs and alcohol isn’t a genetic predisposition because it is a personal choice. It is not a malady nor it is hereditary. Now, you should talk to your kids, friends or anyone who is having problems on drug and alcohol abuse because not talking to them means that you’re consenting them. For additional information about your query, I will attach articles in the form of links below.
Drug And Alcohol Abuse Is A Choice
Addiction is NOT a Brain Disease, It is a Choice – The Clean Slate …
Drug and alcohol addiction is not hereditary or it is not a disease. It is a personal choice. A person can say no to drug and alcohol abuse if he wants to stay sober and if he genuinely wants to make his family happy. It’s not that hard to say no to peer pressure.

Addiction and Free Choice – National Institute on Drug Abuse
Young people should be taught that they need to make their own choices. They should understand the painful consequences if ever they become addicted to intoxication.
A Choice Theory Approach to Drug and Alcohol Abuse
It is a wonderful theory and read about drug and alcohol abuse. You can learn a lot of things from this e-book such as drugs and alcohol abuse facts, drugs and alcohol abuse effects, and drugs and alcohol abuse in teenagers.
You can find good related articles about the topic from Psychiatric Times and Addictions And Recovery.
This video States That Drug And Alcohol Abuse Is Not A Malady.