• Unit 8: Cellular Reproduction: Meiosis

    Meiosis is a specialized type of cellular reproduction that only occurs in the ovaries and testes and results in an egg or sperm, respectively. Sexual reproduction is responsible for the amazing amount of diversity within a species. When sperm fertilizes an egg, the resulting offspring contain genes from the father and the mother. In essence, you contain, at least in a small part, genes from ALL of your ancestors.

    Completing this unit should take you approximately 4 hours.

    • Upon successful completion of this unit, you will be able to:

      • diagram and label the phases of meiosis given a number of chromosomes or chromosome pairs;
      • compare and contrast mitosis and meiosis; and
      • explain the role of meiosis.

    • 8.1: Chromosomes, Chromatids, and Chromatin

    • 8.2: Cell Division, Meiosis, and Sexual Reproduction

      • The Cellular Basis of Reproduction URL

        Read this introduction to sexual reproduction.

      • Sexual Reproduction URL

        Read this section for an overview of sexual reproduction. As you read, think about the ways that sexual reproduction benefits a species by creating diversity.

      • Meiosis URL

        The process of meiosis is unique to animals that reproduce sexually. Read this section to learn about the events that occur during meiosis.

      • Errors in Meiosis URL

        Read this section. Be sure to also complete the multiple choice and free response questions. How would you describe stages of meiosis and how cells are produced? Can you explain why meiosis is needed for sexual reproduction? What are the cells involved in fertilization? How does fertilization occur?

      • Mitosis, Meiosis, and Sexual Reproduction Page

        Watch these lectures to see the steps of mitosis and meiosis. Note the additional step in meiosis that leads to genetic variability. 

    • Unit 8 Assessment

      • Unit 8 Assessment Quiz

        Take this assessment to see how well you understood this unit.

        • This assessment does not count towards your grade. It is just for practice!
        • You will see the correct answers when you submit your answers. Use this to help you study for the final exam!
        • You can take this assessment as many times as you want, whenever you want.