Intro_Grade 10 Life Science - The 4 Mitosis Phases- Copy.pptx

Grade 10 Life Science - The 4 Mitosis Phases

1. Life Sciences The 4 Mitosis Phases

2. 2 Who am I? Name : L esedi Mahlaela Occupation/ Study: 3 rd year Student at UJ Bachelor of Education Maths & Science Tutor Chess Player An interesting fact about yourself: I like football and chess

3. Our focus Briefly define mitosis and eukaryotic cells Break down the four phases of mitosis, in order Provide mitosis diagrams for the stages of mitosis

4. Mitosis and Eukaryotic cells In order to heal an injury, your body needs to replace damaged cells with healthy new ones...and mitosis plays a crucial role in this process Mitosis is a process of cell division that helps you stay alive and healthy. Mitosis is a process that occurs during the cell cycle The role of mitosis in the cell cycle is to replicate the genetic material in an existing cell—known as the “parent cell”—and distribute that genetic material to two new cells, known as “daughter cells Mitosis results in two new nuclei—which contain DNA—that eventually become two identical cells during cytokinesis. Mitosis occurs in eukaryotic (animal) cells

5. Mitosis and Eukaryotic cells Eukaryotic cells have a nucleus that contains the cell’s genetic material A crucial part of mitosis involves breaking down the nuclear membrane that surrounds the cell’s DNA so that the DNA can be replicated and separated into new cells

6. Interphase: What Happens Before Mitosis We can think of interphase as a transitional phase Interphase is when the parent cell prepares itself for mitosis This phase isn’t considered part of mitosis During interphase, the cell is busy growing In the cell cycle, interphase doesn’t just occur before mitosis—it also alternates with mitosis It’s important to remember that this is a recurring cycle When mitosis ends, interphase starts up again

7. The 4 Phases of Mitosis

8. Phase 1: Prophase

9. Phase 2: Metaphase

10. Phase 3: Anaphase

11. Phase 4: Telophase

12. Cytokinesis: What Happens After Mitosis Like interphase, cytokinesis isn’t a part of mitosis Cytokinesis is still considered a separate process from mitosis. Cytokinesis is the actual division of the cell membrane into two discrete cells Cytokinesis is responsible for completing the process of cell division by taking those new nuclei Separating the old cell in half, and ensuring that each of the new daughter cells contains one of the new nuclei At the end of cytokinesis, the division part of the cell cycle has officially ended

13. Thank you The only sure way to avoid making mistakes is to have no new ideas- Albert Einstein