Observe a scientist describe the process used to extract DNA from a cell and to analyze it on a gene chip. [1:41]

Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

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

Explain transformation of DNA
Describe the key experiments that helped identify that DNA is the genetic material
State and explain Chargaff’s rules

This video segment from NOVA: "The Killer's Trail" investigates the potential for DNA evidence to solve murder cases, even those from the distant past.

How is DNA analyzed? How does DNA analysis help us to better understand plant genetics? Students will learn the basics of gel electrophoresis and how applications of this technique can help scientists learn more about the genetics of animals, plants, and crops to inform their research. Objectives: By the end of this course, you will: Be able to identify the structure and components of DNA, Understand and be able to explain the key components of gel electrophoresis, Know how to make an agarose gel, Be able to use gel electrophoresis to determine unknown samples