1. Mitosis VS Meiosis

2. Mitosis Mitosis is essential for cell growth –It’s simply a way to make more of the same cell

3. Mitosis Mitosis is essential for cell growth –It is the process that distributes the genetic material evenly, so that each daughter cell is genetically identical to the parent cell.

4. Meiosis… Meiosis is the process where the genetic material is reduced to half (i.e. only ONE set of chromosomes per gamete)

5. Meiosis Gametes are human reproductive cells –Male gametes are sperm –Female gametes are eggs We determined the probability of gametes traits using punnette squares

6. Meiosis… Because Meiosis creates cells with only half the “normal” number of chromosomes (gametes). When these cells join (as in fertilization) the new individual has the same number of chromosomes as each parent.

7. The 3 Main differences between Meiosis and Mitosis 1)In Meiosis (prophase I) homologous chromosomes pair up and crossing over occurs (Neither of these happens in Mitosis)

8. Genetic variation Why is variation good? –A genetically homogeneous population can be more easily invaded by pathogens and parasites –Differential reproductive success due to variance (population survival won’t be all or nothing) –Cope with new conditions, adapt to new environments

9. Genetic Variation 2) Sources of Variation –Crossing over (when homologues exchange genetic material during prophase) –Independent assortment (all the possible chromosome combinations from one parent) The inclusion of one chromosome into the gamete doesn’t affect the probability of another

10. 3) Meiosis I homologous pairs of chromosomes separates NOT sister chromatids Meiosis (AnaphseI) Mitosis (Anaphase)

11. CATEGORY4321 Content and Development Relevant, telling, quality details give the reader important information that goes beyond the obvious or predictable. Supporting details and information are relevant, but one key issue or portion of the storyline is unsupporte d. Supporting details and information are relevant, but several key issues or portions of the storyline are unsupporte d. Supporting details and information are typically unclear or not related to the topic. Writing Prompt

12. Writing Prompt on Mitosis and Meiosis Write a complete paragraph (topic sentence, four body sentences, and a concluding sentence. Why do our cells do the process of Mitosis and Meiosis?