I'm sure it isn't as simple as that, and I think that that is what you are getting at when remind us of the importance of environment. I don't think that genetics "makes" anyone do anything. The percentage of people who murder is very very small and I don't think half or even one of the children of a murderer would go on to commit murder (or even any other crime necessarily). I belive that adoption studies have shown though that those 15 children will be 'statistically' more likely to engage in deviant behavior than 15 others chosen at random. For examplem the numbers may look more like 1 in 70,000 for the children of killers as opposed to 1 in 100,000 for children of non-murdering parents.
Note: these numbers are completely made up and are probably no where near accurate
! Was just trying to demonstrate how 1 in 15 is much too small a number.
- Chad