Venter: We're much more genetically determined in terms of our physiology. We have 200 trillion cells, and the outcome of each of them is almost 100 percent genetically determined. And that's what our experiment with the first synthetic genome proves, at least in the case of really simple bacteria. It's the interactions of all those separate genetic units that give us the physiology that we see.

Goetz: So on a cellular level, since the genes control the function of the cell, no matter what happens in that cell's environment, we're more the product of our genes than our environment.

Venter: Yes.

- from this interview with Craig Venter