You could find genetically altered foods in almost every aisle of every store, so the questions remain: "How is this done"" and "Is this ethical"" The first question could easily be answered with some prior knowledge of basic biology.

A cell is the smallest living unit and operates under one simple code, DNA. A cell received data and instructions in the form of DNA. There are four different kinds of symbols, called nucleotides, in DNA, A, C, G and T. These letters are arranged into `words' to perform specific commands. The coding sequence of one strand of DNA averages around 1000 symbols.

The cell must know exactly when and how much of the information in the DNA is to be turned into a protein, but how? Simple, the gene consists of three main components, a "control tower", an information block and a polyA signal element. If there is not...