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I was reading the book Genome by Matt Ridley and in it he tells about a particular gene which determines the density and sensitivity of dopamine receptors in the brain. If you have a bunch of dopamine receptors which are activated pretty quickly you will turn out to be a more or less sober person. If on the other hand dopamine receptors are hard to activate or are less numerous you will engage in risky novelty seeking behavior. This is because to you it takes this kind of behavior to sufficiently activate your dopamine receptors. I assume that this also determines whether a person is likely to become a drug user in his life. I guess proneness to smoking must have a similar path.

I wanted to ask others about this. Does any of this make sense. Do you have any other source of information on this.

Edited by the maze runner
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