So the entirety of your argument is:
"Environment is the sole factor in genetic expression. By the way here's a completely incorrect example. Also it's simplified so even though both my premises and conclusion are incorrect, I am still immune from scientific inaccuracies."
Doesn't matter how simplified your argument is. Your logic is faulty, your conclusion is incorrect, and your application of your conclusion is wrong. Environmental factors have been established to be one of multiple factors in genetic expression.
Feel free to look up chromatin structures, cis regulatory elements, transcription enhancers, transcription silencers, and DNA methylation, for starters.
Edited by r31ncarnat3d - 2/26/16 at 4:26am