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Bell Ringer (5)

Bell Ringer (5). What are the stages of the cell cycle?. Bell Ringer. Put these pictures of mitosis in the correct order. Sketch them on your QOD. Label each phase. Mitosis Foldable. Materials: 3 pieces of white paper Stagger the pages about 1 inch apart.

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Bell Ringer (5)

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  1. Bell Ringer (5) • What are the stages of the cell cycle?

  2. Bell Ringer Put these pictures of mitosis in the correct order. Sketch them on your QOD. Label each phase.

  3. Mitosis Foldable • Materials: 3 pieces of white paper • Stagger the pages about 1 inch apart. • Fold the pages “hamburger style” to make 6 flaps. • Label the flaps as follows: (1) The Cell Cycle & Mitosis (2) Interphase (3) Prophase (4) Metaphase (5) Anaphase (6) Telophase & Cytokinesis • On the back, draw the cell cycle.

  4. G1 phase S phase G2 phase M phase

  5. The Cell Cycle • Interphase (period in-between division) • G1 (growth) • S (DNA replication) • G2 (prepare for mitosis) • M phase (division) • Mitosis (division of the nucleus) • Cytokinesis (division of the cytoplasm) • Most of the time the cell is in interphase!!!

  6. Interphase • G1 (growth) • S (DNA replication) • G2 (prepare for mitosis)

  7. Mitosis & Cytokinesis! www.youtube.com/watch?v=VlN7K1-9QB0 CLA

  8. Mitosis Facts mitotic cell division mitotic cell division (a) (b) (c) Multicellular organisms grow, maintain and repair cells by mitosis. CLA

  9. Replication CLA

  10. DNA Doubles CLA

  11. Mitosis • Mitosis is the division of the nucleus. • There are 4 stages of mitosis: • Prophase • Metaphase • Anaphase • Telophase

  12. Terms • Centriole • Centromere • Spindle • Chromosome (sister chromatids) CLA

  13. Prophase • In this stage everything sets up for mitosis. It is the first and longest stage of mitosis. • The nucleolus disappears. • The chromatin condenses into chromosomes. • The centrioles separate and form a spindle of microtubules. • The nuclear membrane breaks down.

  14. Prophase

  15. centromeres sister chromatids CLA

  16. Metaphase • Metaphase is the 2nd phase of mitosis. • The spindle attaches to the centromere of the chromosomes. • The chromosomes line up on the spindle in the MIDDLE of the cell. • Metaphase may last only a few minutes.

  17. Metaphase

  18. Anaphase • Anaphase is the 3rd phase of mitosis. • In this phase the chromosomes are pulled APART at the centromere. • Sister chromatids are pulled to opposite ends of the cell. • Anaphase begins as soon as the chromosomes begin separating and ends as soon as the chromosomes stop moving.

  19. Anaphase

  20. Telophase • This is the last phase of mitosis. • Chromosomes disperse and tangle back into chromatin. • 2 nuclear envelopes form around the chromatin. • The spindle breaks down. • The nucleolus becomes visible.

  21. Telophase

  22. Cytokinesis • Cytokinesis is the division of the cytoplasm. • It usually occurs at the same time as telophase. • The cytoplasm can be divided 2 ways: • Animal cells pinch off into 2 cells. • Plant cells form acell plate (which is the beginning of the cell wall)

  23. Cytokinesis in Animal Cells

  24. Cytokinesis in Plant Cells

  25. Final Product • The final product of mitosis and cytokinesis is: • 2 genetically identical daughter cells

  26. Mitosis - can youname the stages? CLA

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