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jimrandomh comments on Undiscriminating Skepticism - Less Wrong
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I don't know about exclusively.
You're right that that was too strong; I should have said it's determined largely by the mother's genetics (but also to lesser degrees by the father's genetics and environmental factors.) But note that the strongest known environmental factor, alcohol consumption, is at least somewhat genetic (http://psychiatry.healthse.com/psy/more/alcoholism), and other factors like susceptibility to smoking addiction probably are as well.
Maternal Stress affects offspring.
So does malnutrition.
Any given chemical is not equally likely to cause pleasure for human beings, so of course alcohol and nicotine consumption have a genetic basis. It seems equally obvious that the availability of alcohol and nicotine are part of the environment. Additionally, they are parts of the environment where it is easy to imagine life being substantially similar without them (unlike environmental influences such as oxygen and gravity).