You will have to research that out for yourself, Lazy J.
This thread has already gotten off track several times with several different issues, and the issue of GMO is SO COMPLICATED that it defies a simple and short explanation.
Even if it did lend itself to that, I would not be the one to give it. There is a big difference between understanding the problem, and being able to explain it sufficiently. I have a working understanding of the problem, but I am not able to explain the issue sufficiently to do you justice.
My expertise is in analyzing quantitatitive research results (I teach quantitative research methods and statistics at the University of Memphis), not biochemistry or microbiology. In fact, I have only one biochemistry class and one microbiology class in my past -- and both of them were survey level courses.
The best explanations that I have found for those of us who are NOT biochemists or microbiologists are one of several films, all available on DVD at amazon.com for a reasonable cost: "The Future of Food," or else "King Corn." I have not yet viewed "Food, Inc." (I have it sitting on my desk, waiting to be viewed), but I am assuming that that film will probably also give a good layperson's explanation of the very complicated issue.
I'm not trying to duck the question, Lazy J., or blow you off.
I just am not a really good person to give you the explanation that you deserve. Please look into one of these DVDs.
There may be some place on the net that does a good job of explaining the issues. I'm not really up on that -- and I'm not sure I will have the time to search the net tonight -- but I'll throw the question out to others who are more knowledgeable on this issue than I am, and see if they can come up with a really good link for you.