Labels and logos bombard us in ads and tag our fruit. What do they stand for, and how will they affect us? “Genetically Modified,” or GM, for short, is one of the most controversial results of modern biochemistry. The genetic makeup of an organism is modified, in most cases by one gene. For years, farmers have used selective breeding, keeping the seeds from the healthiest corn plants for their next crop. Through repetition, a resistant strain can be developed. Today, this process is done quickly and precisely in the lab using biotechnology. GM technology appeared in the 1980s when a bacterium was modified to carry the human insulin gene. Thus, high-quality insulin was produced cheaply for diabetic patients.