need help re: genetics versus environment

[FairLadyRantALot]

We are doing a life stage developement presentation, and the group I am in is doing adolescence and I have volunteered to provide the physical changes side of thing....now we are meant to provide theories, and all the others have specific theories, now I have tried to find somehting on genetics versus environment...and am not getting anywhere, sigh....anyone provide theorists names on either side of the coin?

Not sure I am making sense...because, I am honestly loosing the will to live, lol.....

On the environmental side of things I would look at the "Love and Logic" people's work and see who they site and also have a look at Morris Massey's theory that "What You Are is Who You Were When."

"What You Are is Where You Were When"

thank you....
I finally found anohter theory that I could use that fitted in nicely and was even Occupational Therapy based....so, will be using that...but thank you very much