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Perhaps the oldest and most prevalent occupations for animal genetics lies simply in the field of animal breeding. Since the dawn of man's domestication of animals, humans have attempted to modify the growth patterns of livestock to produce hardier food sources. Selective breeding techniques produce the desired traits in animals we use for a variety of survival needs. Today, much of this research involves controlling the genetic values of animals, revolutionizing the food and textile industries.
Right: Genetically Modified Cow. (Supplied by foxypar4 at Flickr; Creative Commons 2.0; http://www.flickr.com/photos/foxypar4/2302057730/)