environmental influences

A woman stares out a window. Behind her, in the foreground, a glass of wine sits next to a bottle. (Photo: Getty Images)

Bad Genes

More Genes Found with Link to Addictions Many human diseases, such as tobacco and alcohol addictions, are heritable. Until now, little has been known about what genetic factors contribute to these addictions, and if they put people at risk of inheriting other medical conditions.
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