Turns to human experimentation with DNA - moving genes around, recombinant DNA. The ways and outcomes of transferring genes from one organism to another. We begin with an explanation of restriction enzymes, the chemistry that makes recombinant DNA possible. The gene gun is a crude way of transferring DNA. Bacterial plasmid vectors are more sophisticated. They have resulted in biological products made like the production of human insulin via bacterial culture. Gene therapy and cancer. Applications in agriculture.