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Asexual Reproduction

Asexual Reproduction. Mitosis. Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide?. 1. Ready?. Begin!. 3:00. Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide?. 2:00.

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Asexual Reproduction

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  1. Asexual Reproduction Mitosis Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide? 1

  2. Ready? Begin!

  3. 3:00 Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide?

  4. 2:00 Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide?

  5. 1:00 Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide?

  6. TIME’s UP!

  7. Asexual Reproduction Mitosis Mitosis is the process in which the cells divides to form two cells. Why do you think cells must divide? ANALYZE (break apart, study the pieces) There is a question within a question in this DSQ. Can you identify the question within the DSQ? 7

  8. How do little elephants grow up to be BIG elephants?

  9. Why do animals shed their skin?

  10. Daily Notes • What are the reasons cells divide?

  11. Three reasons why cells reproduce by mitosis: 1. Growth 2. Repair 3. Replacement Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly.

  12. Daily NotesOpen your books to page Page 97

  13. Goal for today: Identify the stages in meiosis • Did you meet your goal today? • 4 I can teach the steps of meiosis to someone else • 3 I can explain the steps but don’t understand what they mean • 2 I can remember most of the steps • 1 If someone give me hints I can explain some of the steps of mitosis • 0 I have no idea what you’re talking about

  14. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis

  15. Interphaseoccurs before mitosis begins • Chromosomes are copied (# doubles) • Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm

  16. Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  17. Prophase 1st step in Mitosis • Mitosis begins (cell begins to divide) • CentriolesChromatins are visible Centrioles Sister chromatids Spindle fibers

  18. Prophase Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  19. Metaphase 2nd step in Mitosis • Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

  20. Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  21. Anaphase 3rdstep in Mitosis • Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

  22. Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  23. Telophase4th step in Mitosis • Two new nuclei form. • Chromosomes appear as chromatin (threads rather than rods). • Mitosis ends. Nuclei Nuclei Chromatin

  24. Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  25. Cytokinesisoccurs after mitosis • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

  26. Animal Mitosis -- Review

  27. Plant Mitosis -- Review

  28. Friday WOWWWWWWWWWW

  29. Look up your Vocab! • Mitosis- page 95 • DNA- page 93 • Interphase- page 94 • Cytokinesis - page 95 • Cell Cycle- page 94 • Chromosomes- page 93 • Mieosis • Haploid vs diploid

  30. Daily Notes • Why must cells divide in mitosis? • 1. Growth2. Repair3. Replacement • 4. Reproduction

  31. Cell Cycle

  32. MitosisAnimation http://www.cellsalive.com/mitosis.htm

  33. Single sex cells are called gametes (sperm/egg)

  34. Zygote- fertilized egg

  35. the process of nuclear division where the number of the chromosomes is halved. produces four daughter cells all daughter cells are haploid chromosomes are shuffled in the process, so that each daughter cell has a unique combination used to create gametes (sperm and egg)

  36. Mitosis creates diploids (full set of chromosomes) • Meiosis creates haploids(half # of chromosomes)

  37. Goal for today: Identify the stages in meiosis • Did you meet your goal today? • 4 I can teach the steps of meiosis to someone else • 3 I can explain the steps but don’t understand what they mean • 2 I can remember most of the steps • 1 If someone give me hints I can explain some of the steps of meiosis • 0 I have no idea what you’re talking about

  38. Asexual Reproduction Mitosis Meiosisis the process in which sex cells divides twiceto form 4(not 2) sex cells with half the chromosomes. Why do you think cells must divide with only half of the chromosomes? 39

  39. Ready? Begin!

  40. 3:00 Meiosis is the process in which sex cells divides twice to form 4(not 2) sex cells with half the chromosomes. Why do you think cells must divide with only half of the chromosomes?

  41. 2:00 Meiosis is the process in which sex cells divides twice to form 4(not 2) sex cells with half the chromosomes. Why do you think cells must divide with only half of the chromosomes?

  42. 1:00 Meiosis is the process in which sex cells divides twice to form 4(not 2) sex cells with half the chromosomes. Why do you think cells must divide with only half of the chromosomes?

  43. TIME’s UP!

  44. Asexual Reproduction Meiosis is the process in which sex cells divides twice to form 4(not 2) sex cells with half the chromosomes. Why do you think cells must divide with only half of the chromosomes? Half from mom half from dad! When they join together they form a whole baby! Mitosis 45

  45. THIS IS NOT A QUIZ 1)What are the two ways cells divide? 2) What cell division occurs only in sex cells? 3) What phase in the cell cycle is the most common? 4)Explain the difference between mitosis and meiosis using at least 3 examples

  46. THIS IS NOT A QUIZ 1)What are the two ways cells divide? 2) How many cells are created in mitosis 3) How many cells are created in meiosis 4) What cell division occurs only in sex cells?

  47. Daily Notes Compare and contrast meiosis and mitosis. Page 106

  48. Vocab page • Gamete • Zygote • Diploid • Haploid • Meiosis

  49. Cell Division What is the purpose? What is the purpose? Stages of _______________ Include images Stages of _______________ Include images

  50. Ticket out of the door Explain the main phases of mitosis. What phase does the cell begin to divide? What are the reasons cells divide?

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