See James Watson reenact his discovery of the base pairs that form the double helix structure of the DNA molecule. [1:42]

Discover how the structure of DNA relates to its hereditary function in these videos from the American Masters film Decoding Watson. The first video, "DNA Structure and Function," [2:07] can be used with all middle and high school biology classes. The second video, "Discovering DNA," [0:55] is the Hereditary Material, contains advanced material and is more suited for students i n AP Biology classes. The accompanying classroom activity, appropriate for all students, explores how the building blocks of DNA assemble into a double helix. Additional support materials are available, including handouts, discussion questions and vocabulary.

The link will list a variety of topics about genetics. Click on topic 17 for a very good tutorial on the discovery of DNA. Click along the bottom margin for the different screens.

This is a comprehensive site that tells the story behind one of John Singleton Copley's most famous paintings, "Watson and the Shark." The site discusses the artist's life and provides compositional information about the painting. Excellent references to the works by other artists that inspired the painting, including many Renaissance masters and Copley contemporary Benjamin West.

Psychology is designed to meet scope and sequence requirements for the single-semester introduction to psychology course. The book offers a comprehensive treatment of core concepts, grounded in both classic studies and current and emerging research. The text also includes coverage of the DSM-5 in examinations of psychological disorders. Psychology incorporates discussions that reflect the diversity within the discipline, as well as the diversity of cultures and communities across the globe.Senior Contributing AuthorsRose M. Spielman, Formerly of Quinnipiac UniversityContributing AuthorsKathryn Dumper, Bainbridge State CollegeWilliam Jenkins, Mercer UniversityArlene Lacombe, Saint Joseph's UniversityMarilyn Lovett, Livingstone CollegeMarion Perlmutter, University of Michigan

By the end of this section, you will be able to:

Explain how classical conditioning occurs
Summarize the processes of acquisition, extinction, spontaneous recovery, generalization, and discrimination