Genetically engineered (GE) foods have had their DNA changed using genes from other plants or animals. Scientists take the gene for a desired trait in one plant or animal, and they insert that gene into a cell of another plant or animal. Genetic engineering can be done with plants, animals, or bacteria and other very small organisms. Genetic engineering allows scientists to move desired genes from one plant or animal into another. Genes can also be moved from an animal to a plant or vice versa. Another name for this is genetically modified organisms. This relatively new science allows DNA (genetic material) from one species to be transferred into another species, creating transgenic organisms with combinations of genes from plants, animals, bacteria, and even viral gene pools. The mixing of genes from different species that have never shared genes in the past is what makes GMOs and GE crops so unique. It is impossible to create such transgenic organisms through traditional crossbreeding methods.