Plus..
But I was watching Nova and it got real interesting...
On epigenetics.. The Science of change...
Genes may not be the whole story as epigenetics are triggers..
Can be inherited from generation like from poor nutrician and health..
Environmental toxins and exposures in past generations..
The links to the past and future...
They injected pesticides in mice and it effected rats DNA...
And they talked about Autism as well..
As there is no distinctive Autistic gene..
And they also looked at identical twins...
Same genes.. One severly autistic.. One not....
And thats where epigenetics play a role....

http://www.ehponline.org/members/2006/114-3/focus.html
The bottom of the iceberg is epigenetics. ”
And the triggers are...

Known or suspected drivers behind epigenetic processes include many agents, including heavy metals, pesticides,
diesel exhaust, tobacco smoke, polycyclic aromatic hydrocarbons, hormones, radioactivity, viruses, bacteria, and basic nutrients...

Gives one alot to think about.....
Doesn't it......
Of what can effect the future generations....
As well as what efects us all now...