Cell Division

3,367 views

Published on

This is a presentation that I used to introduce the basics of cell division to my freshmen Biology students.

Published in: Education, Technology
0 Comments
6 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
3,367
On SlideShare
0
From Embeds
0
Number of Embeds
129
Actions
Shares
0
Downloads
519
Comments
0
Likes
6
Embeds 0
No embeds

No notes for slide

Cell Division

  1. 1. Cell Division
  2. 2. Why is Cell Division Important??
  3. 3. DNA Deoxyribonucleic Acid
  4. 4. What is Deoxyribonucleic Acid? <ul><li>Long thin molecule that stores genetic information </li></ul><ul><li>Responsible for the inheritance of traits. </li></ul>
  5. 5. Chromosomes <ul><li>DNA coils into structures called CHROMOSOMES during cell division </li></ul>
  6. 6. Chromosomes CHROMATID CENTROMERE I’m a Chromosome !!
  7. 8. Chromosome types <ul><li>Human chromosomes are arranged into two types </li></ul><ul><li>SEX CHROMOSOMES – determine sex of individual (X,Y) </li></ul><ul><li>All other chromosomes are called AUTOSOMES </li></ul>
  8. 9. Diploid Cells <ul><li>Most cells in your body are somatic </li></ul><ul><li>Contain 2 of each chromosome (this is the diploid number) </li></ul><ul><ul><li>46 total </li></ul></ul><ul><ul><li>23 homologous pairs </li></ul></ul>
  9. 11. BINARY FISSION <ul><li>Prokaryotic cells </li></ul><ul><ul><li>bacteria </li></ul></ul>
  10. 13. Cell Division is a process where new body cells are made <ul><li>And the new cells (daughter cells) are identical to the parent cells </li></ul><ul><li>How…and…Why??? </li></ul>
  11. 14. MITOSIS <ul><li>I ntelligent P eople M eet A t T hree O’ C lock” </li></ul><ul><li>INTERPHASE </li></ul><ul><li>PROPHASE </li></ul><ul><li>METAPHASE </li></ul><ul><li>ANAPHASE </li></ul><ul><li>TELOPHASE </li></ul><ul><li>CYTOKINESIS </li></ul>
  12. 15. The Cell Cycle <ul><li>INTERPHASE </li></ul><ul><ul><li>Time between cell divisions </li></ul></ul><ul><li>MITOSIS </li></ul><ul><ul><li>Nucleus of cell divides </li></ul></ul><ul><li>CYTOKINESIS </li></ul><ul><ul><li>Division of cytoplasm of cell </li></ul></ul>
  13. 18. INTERPHASE <ul><li>G1 -cells grow </li></ul><ul><li>S -DNA duplicateS </li></ul><ul><li>G2 -cell prepares for division </li></ul><ul><li>G0 -cells exit cycle-quit growing </li></ul>
  14. 19. PROPHASE <ul><li>DNA coils into chromosomes </li></ul><ul><li>Centrosomes appear </li></ul><ul><ul><li>will later give out spindle fibers </li></ul></ul><ul><li>Nuclear envelope disappears </li></ul>
  15. 21. METAPHASE <ul><li>Chromosomes line up along middle of cell by the spindle fibers attached to centromeres </li></ul>
  16. 23. ANAPHASE <ul><li>Chromosomes separate and move toward opposite poles of dividing cell </li></ul>
  17. 25. TELOPHASE <ul><li>Chromosomes reach opposite ends of cell </li></ul><ul><li>Chromosomes decondense </li></ul><ul><li>Membrane starts to form </li></ul>
  18. 27. CYTOKINESIS <ul><li>Cytoplasm of cell divides </li></ul><ul><li>Cell membrane pinches inward </li></ul>
  19. 28. Metaphase
  20. 29. Interphase
  21. 30. Prophase
  22. 31. Telophase
  23. 32. Anaphase
  24. 33. <ul><li>2 new things you learned today… </li></ul><ul><li>Questions you still have… </li></ul><ul><li>What information do you still need that you are missing? </li></ul><ul><li>What still doesn’t make sense? </li></ul><ul><li>Something else you would like to talk about that is related. </li></ul>

×