What role do genes play in shaping aggression?

Answer 1

they haven't really found an aggression gene, like they have for alcoholism or obesity or the like. aggression is primarily a learned behavior -- resulting from your socialization and home environment. esp in childhood. genes have a strong role to play in your propensity towards it, to some extent i'm sure -- as with anything else, but mostly it's learned through imitation of models (such as parents, peers, other authority figures, childhood heroes, etc).

Answer 2

Well, I feel really aggressive if mine are too tight.