See how an X or Y chromosome carried by a sperm cell, determines the sex of the offspring in this video. [5:52]

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 advantages and disadvantages of asexual and sexual reproduction
Discuss asexual reproduction methods
Discuss sexual reproduction methods

Excellent site where students are challenged to read several case studies and make choices about what they would do in the situation. After they choose they are presented with some of the consequences that their decision may produce in order to see if it changes their decision.

This site is a must see for any lesson or unit on biotechnology! It is a companion to the PBS video "Bloodlines: Technology Hits Home," although it can certainly be used without the video. It's a fantastic site that will challenge students to think about their opinions in several ethical dilemmas. There is a timeline of genetic and reproductive technology and more.