Find out how cytoplasmic factors in a developing embryo play a vital role in determining which genes to turn on and off for appropriate cell development. [0:56]
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 how chromatin remodeling controls transcriptional access
Describe how access to DNA is controlled by histone modification
Describe how DNA methylation is related to epigenetic gene changes
By the end of this section, you will be able to do the following:
Discuss the role of transcription factors in gene regulation
Explain how enhancers and repressors regulate gene expression
