Genetically modified wheat. Conceptual computer artwork of a crop of genetically modified (GM) wheat (Triticum sp.). Two heads of wheat form a DNA double helix. Wheat, a type of cereal, is one of the world's most important crops. 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, that will result in increased yield. However, it is controversial whether GM foods are safe to eat and what their effect on the environment will be.
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