Chapter 14 - Related Web Sites

• Legacies-Transformation and DNA explores how genetic material can be transformed from one bacterium to another, as discovered during Griffith's experiments in the late 1920's. This web site also describes the follow-up works of Avery, MacLeod, and MacCarthy that showed DNA was the genetic material of all organisms.

• The One Gene/One Enzyme Hypothesis discusses Beadle and Tatum's 1941 breakthrough in finding the connection between genes and enzymes. How understanding the genetic code will advance the field of biotechnology is also considered.

• In Experiments that Inspire, the Hershey-Chase experiments are described, along with information on when viruses were discovered, and why there was the need to know what was the genetic material.