Through video clips, demonstrations, and inquiry learn how the wing morph functions in the process of evolution. [0:29]
A concise overview of what happens when a mutation occurs in our DNA, and how that causes some cancers. [1:06]
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:
Describe the different types of variation in a population
Explain why only natural selection can act upon heritable variation
Describe genetic drift and the bottleneck effect
Explain how each evolutionary force can influence a population's allele frequencies
By the end of this section, you will be able to do the following:
Discuss the different types of mutations in DNA
Explain DNA repair mechanisms
By the end of this section, you will be able to do the following:
Describe how cancer is caused by uncontrolled cell growth
Understand how proto-oncogenes are normal cell genes that, when mutated, become oncogenes
Describe how tumor suppressors function
Explain how mutant tumor suppressors cause cancer
This pathway provides an introduction to the cell cycle and how its regulation is important to normal cell division. Cancer is often caused by unregulated cell division. For a deeper look at this topic, we recommend the pathway Cell Reproduction from the OpenStax textbook Biology for AP® Courses.
This pathway explores the processes of transcription and translation that allow cells to produce proteins from DNA.
This article explains how and why mutations are so important to genetics.
This article contains information on how DNA is repaired to prevent mutated damage from interrupting DNA processes.
Experiments found that DNA could sometimes recover from damage. This article illustrates how the discovery was made. Article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
A brief overview of Sickle cell anemia, a genetic disease that affects hemoglobin in the blood. [1:30]
Even in species that look alike to us, individuals have variations in their DNA. Learn why this is important. [3:47]
Video and text present a good explanation of what mutations are. [1:41]
