Page 85 - Science Course 2 (Book 1)
P. 85

Mo3-L3c:  Why is Sexual Reproduction Important?





                      Key Concept                           Mo3-L3c         Why is Sexual Reproduction
                 What are the Phases of Meiosis?                                    Important?

                    Why is Meiosis important?              KEY CONCEPTS:
                                                           1. What are the difference between mitosis and
                                                                meiosis?
                                                           2. Why is sexual reproduction beneficial?
                                                          Let’s Begin




                                                          How do mitosis and meiosis differ?
                                                          During mitosis and cell division, a body cell and its
                                                          nucleus divide once and produce two identical cells.

                                                          The two daughter cells produced by mitosis and cell
                                                          division have the same genetic information.













                                                                      Mitosis           Two diploid cells

                                                          During meiosis, a reproductive cell and its nucleus
                                                          divide twice and produce four cells—two pairs of
                                                          identical haploid cells.

                                                          Meiosis forms sex cells used for sexual reproduction.


                                                                       Mitosis            Meiosis
                                                                       Diploid             Diploid

                                                                         46                  46
                                                           Start



                          SUMMARY
                 What are the Phases of Meiosis?

         Organisms produce sex cells through meiosis.
                                                            End      46       46     23   23    23   23


                                                                       Diploid             Haploid














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