I am totally and completely lost in trying to decipher this thread. One is stomping his feet, making statements about "choices" and "free will" while others are insisting that they have no idea what he's talking about and that it has nothing to do with DNA.
If someone smacks me upside my head, I am going to feel pain. To feel this pain is not a choice. I feel this pain because of biological processes of nerve endings sending messages to my brain.
If I lose my footing while on a ladder, I am going to fall. I am not going to choose to fall. I will fall because there is this thing called "gravity"; a principle that greater mass attracts lesser mass; and the earth has more mass than my tiny body, so I will be pulled to that greater mass. I will fall regardless of choice.
Yes, I am well aware of philosophical, sociological and psychological debates regarding whether or not people truly have "free will". Can we simply choose a given thing? Or are we simply products of our genetics and experiences? When presented with a fork in the road, am I truly free to choose my path; or is it inevitable that one part of my brain will be dominate and I, like any other animal, will simply do that which I will do? The jury is largely still out this philosophical debate; and this debate extends to scientific fields, such as neurology.
But even if we include our genetics and environment, our experience indicates that we have free will; the power to choose; so just for sake of argument, we'll capitulate that humans have free will. As a human being with free will, I can choose to go to the store or stay home. I can choose to behave morally or immorally. I can choose which god, if any, to believe in (and I truly believe that if we want to believe something bad enough, we have the power to convince ourselves of it).
But I can not choose whether or not to feel pain. I can not choose whether or not to be drawn towards the greater mass of the earth. I can not choose whether or not there is a god. I can not choose whether or not evolution is true. And I can not choose whether or not the principles of DNA exist.