What is the link between heredity and tobacco addiction?

Like alcohol, nicotine dependence is also linked to genetic factors. Various genetic studies indicate that nicotine dependence is heritable as there are many genes responsible for inheritance of smoking behavior. This study however notes that addiction to drugs is as a result of either heritable or inheritable factors.

Explanation:

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B. Some people have genes that make it easier for them to become addicted to tobacco."

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