Genes determine basic behavior, like the behavior associated with being a predator. Or avoiding being eaten by a predator. This we know to be true because millions, zillions, of years of evolution must have shaped genes … especially in mammals with with their whopping big brains and all … to have genetically coded behaviors.http://www.bloggingwv.com/love-everybody-even-the-squirrelly-ones/Or, perhaps not. Perhaps we need a slightly different view of behavioral genetics. (click on the picture to see the whole story..)