Genetic engineering is when the genetic code of an organism is changed to produce a desired trait. By taking two genes and combining them you produce the trait you want. All living things have DNA but none are the same. Every trait you can think of is coded in DNA. Personally I believe technology with this type of experiment is very touchy. I am not quite convinced that engineers have it down to a science to alter genes. For one, I think it is very dangerous to be relying on science to alter your DNA.