ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Genetically engineered maize. Conceptual computer illustration of a DNA double helix around a genetically modified (GM) corn cob. DNA (deoxyrib- onucleic acid) is the molecule which controls the growth and development of all living things. It has the shape of a double helix (mauve). Corn, or maize (Zea mays), is a crop grown throughout the warmer regions of the world. Genetic engineering involves altering an organism's DNA to give it beneficial traits. In crops, these may increase resistance to pests and diseases, give an increased yield and protect the plants from weedkillers.
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