This site explores the history and the science of DNA. Content also examines and considers the possibilities of genetic engineering and mutation.

Read a history of the discovery and study of DNA and its structure. Links to a graphic, other references, and classroom activities.

Explains the structure of DNA and the seven steps that take place during DNA replication. Includes a labeled illustration for each step.

Tutorial on DNA basics that goes along with an online quiz over the material. Use the naviagation buttons at the bottom of the page to go to the quiz over the material.

Describes the structure and coding of DNA, how it replicates, and the role it plays at the cellular level. Looks at past and current research on DNA, and applications of this research. (Published: September 25, 2010)

Learn about the experiments by Frederick Griffith, Oswald Avery, Alfred Hershey, and Martha Chase that led to the discovery of DNA as the genetic material.

Learn about the Austrian biochemist and author, Erwin Chargaff, best known for "Chargaff's Rules" which lead to the discovery of DNA's double helix structure.

[Free Registration/Login may be required to access all resource tools.] In ths module, discover the structure of a single nucleotide and how that structure leads to the overall structure of DNA and RNA.

A look at the techniques scientist use to analyze DNA for genetic similarities.

A good page devoted to the RNA family of viruses that differ slightly from standard DNA viruses. Discusses the difference and characteristics of such viruses.

Students learn about James Watson and Francis Crick's biography on this website. Understand how these scientists discovered the structure of DNA called the double helix. They were molecular biologists.