A close-up look of the fertilization of the C. elegans oocyte. [1:12]
This slideshow helps you discover the beginning of embryonic development and how it is fertilized, how it grows, and how it, in turn, becomes a pregnancy. [2:18]
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:
Discuss internal and external methods of fertilization
Describe the methods used by animals for development of offspring during gestation
Describe the anatomical adaptions that occurred in animals to facilitate reproduction
By the end of this section, you will be able to do the following:
Discuss how fertilization occurs
Explain how the embryo forms from the zygote
Discuss the role of cleavage and gastrulation in animal development
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 what must occur for plant fertilization
Explain cross-pollination and the ways in which it takes place
Describe the process that leads to the development of a seed
Define double fertilization
A video exploring the process of fertilization where two sets of chromosomes come together to form a zygote. Video defines haploid, diploid, zygote, and fertilization. [10:26]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
A narrated animation of the process of ovulation. This video shows a simulation of the path an egg takes from the fallopian tubes to the uterus. [1:28]
This video segment from NOVA: "18 Ways to Make a Baby" describes a technique used to determine the health of a developing embryo. [3:35]
This set of exercises provides well written procedures and background for labs at basic and advanced levels.
Learn how a zygote, the single cell produced by fertilization, divides by mitosis to produce all the tissues of the human body (including germ cells, which can undergo meiosis to make sperm and eggs). [9:35]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
