PPT MITOSIS in science 7 class how .pptx

grade 7

1. Science 7 ARVIE FUENTES LABUSAN Science Teacher

2. Objectives : Define Mitosis . Identify and explain the different phases/stages of mitosis . Appreciate the importance of mitosis in all living organisms.

3. Do you still remember your appearance as a child? How would you compare your appearances then VS now ? In what aspect did your body change ? How do you think did this happen? What enables you to grow?

4. Vocabulary Spindle Fibers- protein structure that divides the genetic material in a cell. Chromatin - mixture of DNA and proteins that forms the chromosomes. Chromatid- one of the two identical halves a chromosomes.

5. What Do you see?

6. What Do you see?

7. What Do you see?

8. What Do you see?

9. https ://www.youtube.com/watch?v=-PfVNZedmGA Guide Questions: 1 . What is mitosis, and why is it important? 2. What are the steps of mitosis, and what happens in each? 3. Could you imagine if there’s no mitosis? If yes, what will be the possible outcome?

10. Cell Cycle - A sequence of growth and division of a cell. - Two general periods of a cell cycle are the Interphase and the Mitotic phase .

11. Cell Cycle

12. Cell Division - Occurs when parent cell produces 2 daughter cells. -2 types : mitosis and meiosis.

13. Mitosis - Type of cell division that occurs in all other cells in the body. - Responsible in growth and repair.

14. Cell- Division Cycle Has two major phases: Interphase 2. Mitotic phase Interphase 3 sections: G1 phase, S phase and G2 phase

15. Prophase - Chromatin, which is tightly packed DNA and protein are further condensed to form chromosomes. - Spindle fibers begin to grow from the 2 centrioles pushing them apart where they lie at opposite ends of the cell.

16. Metaphase - Some spindle fibers attach to the centromeres of the chromosomes, aligning them in the middle of the cell at the equatorial plate.

17. Anaphase - The centromeres that held the sister chromatids together separate and the sister chromatids are pulled by the spindle fibers towards the poles or ends of the cell

18. T elophase A new nuclear envelop forms around the chromosomes, a nucleolus reforms within the nucleus. - The spindle fibers disappear the chromosomes uncoil to form chromatin and cytokinesis continues.

19. Lesson Activity Mitosis Matching (Paired Activity) Instruction: Pair the phase of mitosis with the corresponding description given below. Write your answer in the blank provided. The students may use each phase more than once.

20. Lesson Activity Mitosis Matching (Paired Activity) Instruction: Pair the phase of mitosis with the corresponding description given below. Write your answer in the blank provided. The students may use each phase more than once.

21. Prophase Metaphase Anaphase Telophase Cytokinesis _______________ 1. The sister chromatids are moving apart. _______________ 2. The nucleolus begins to fade from view. _______________ 3. The cell plate is completed. _______________ 4. The spindle is formed. _______________ 5. The chromosomes are located at the equator of the cell. _______________ 6. Cell division is completed. _______________ 7. The nuclear membrane begins to fade from view. _______________ 8. The division (cleavage) furrow appears. _______________ 9. The chromosomes are moving towards the poles of the cell. _______________ 10. The reverse of prophase.

22. Lesson Activity Mix and Match: MITOSIS Version (Group Activity) Instruction: Cut out the four diagrams and descriptions of the stages of mitosis and stick them on bond paper in the correct order. DIAGRAM OF STAGE DESCRIPTION OF STAGE

23. My Learnings What key concepts did you learn about mitosis?

24. 3-2-1 Exit Card 3 Thing s you have learned ? 2 Things you would like to learn more about? 1 Questions you have in mind?

25. Quiz Time Instruction: Encircle the letter of the word, words, or phrases that best completes each sentence. (1 point each) 1. During which phase do chromosomes first become visible? a. anaphase b. telophase c. metaphase d. prophase 2. Cytokinesis begins in which phase? a. metaphase b. telophase c. prophase d. anaphase

26. Quiz Time 3 . At the beginning of metaphase, all chromosomes are ________. a . at different locations in the cell b. still in the nucleus c. aligned at the equator d. at one of two poles in the cell 4. As anaphase begins, each matching chromatid is ________. a. pulled towards a different centriole b. pulled towards the same centriole c. pulled towards a different centromere d. pulled towards the same centromere 5. During telophase , a nucleus ________. a. forms around one of the two sets of chromosomes b. forms around each set of chromosomes c. forms in the center of the cell d. forms near each set of chromosomes