Genetically-modified maize. Petri dish containing sprouting genetically-modified (GM) maize kernels (Zea mays). Maize, commonly known as corn, is grown for food in tropical and subtropical regions worldwide. Genetic modification of plants involves altering their DNA (Deoxyribonucleic acid), the chemical which controls every part of an organism's growth and development. This modification may give the plant desirable characteristics, such as resistance to disease and herbicides. In this case the maize plant has been modified to improve its resistance to glyphosinate-type weedkillers. It is controversial whether GM foods are safe to eat.
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