Genetic Engineering:

Genetic Engineering: Unlike open-pollination and hybridization, which occur in nature, genetic engineering requires human intervention in a laboratory setting directly manipulating DNA. Genetic engineers insert a foreign gene into the host DNA usually using one of two different methods: 1) ballistic — in which a gun injects foreign DNA, and 2) biological — in which a biological vector, usually a virus, carries the foreign gene into the DNA. Genetic engineering has the ability to cross all natural species boundaries and its products are often called “transgenic” (literally across genus boundaries). It is possible to insert a fish gene into a tomato or a pig gene into a corn — which would never occur in nature without human intervention.