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 behavior of chromosomes during meiosis, and the differences between the first and second meiotic divisions
Describe the cellular events that take place during meiosis
Explain the differences between meiosis and mitosis
Explain the mechanisms within the meiotic process that produce genetic variation among the haploid gametes

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

Describe the three stages of interphase
Discuss the behavior of chromosomes during karyokinesis/mitosis
Explain how the cytoplasmic content is divided during cytokinesis
Define the quiescent G0 phase

The Cell Biology Project at the University of Arizona provides an explanation of mitosis, DNA basics, diagrams and a practice exercise.

Poses and answers the question, "What is (and is not) mitosis?" An overview with images of the phases of mitosis, plus a mitosis animation.

This resource provides a detailed diagram of animal, bacterial and plant cells and viral structure. Also included are detailed drawings, with definitions, of each of the cellular organelles.

During mitosis, the DNA in a nucleus must replicate. The copied DNA is divided into two genetically identical sets, so that after cytokinesis or cell division, each cell has a complete set of genetic instructions. Learn more about mitosis and cytokinesis in this learning module produced by CK-12.

A free CK-12 account is required to view all materials.

This cell biology lesson explains and illustrated the different phases of meiosis. Includes vocabulary and assessment links as well as othe related resources.

Has explanations, illustrations, and a Quick Time movie to download. Also contains practice test questions that are answered online.

Read a brief introduction to mitosis, and then click on the 5 phases to read details and view photos of each in progress. Photo examples are excellent.