Re: Miami: XYY

Martin Phipps wrote:

[snip very interesting information]

> One question I would then ask though: why are men more agressive
> than women if not for our testosterone levels?  Is it _just_ a
> result of how we were raised?  I have serious doubts.

There are more factors in aggression than just testosterone, and
testosterone isn't the end-all-be-all of gender difference. There are
other hormones that play huge roles, like serotonin (which brings in
the MAO-A enzyme). The more serotinin, the better a person feels, and
people who feel good don't tend to get aggressive.

It also appears that most men have a smaller frontal cortex (the area
of the brain that controls emotion) than women. Women appear to have a
greater range of frontal cortex sizes than men, but they average
larger.

All of these things can be altered by genetics as much as by
environment. So it's never *just* nature or nurture.