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How do we get new cells?

How do we get new cells?. Cells reproduce through a process called …. asexual reproduction. Asexual reproduction is reproduction without sex. (a – without; sexual – sex). A new organism is produced from one organism. The new organism is identical to the “parent” organism.

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How do we get new cells?

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  1. How do we get new cells?

  2. Cells reproduce through a process called …

  3. asexual reproduction.

  4. Asexual reproduction is reproduction without sex.

  5. (a – without; sexual – sex)

  6. A new organism is produced from one organism.

  7. The new organism is identical to the “parent” organism.

  8. Cells reproduce by a process called mitosis.

  9. Mitosis

  10. Mitosis is the process in which the nucleus divides to form two identical nuclei.

  11. The nucleus in the new cell is identical to the original nucleus.

  12. Steps of Mitosis

  13. At the end of Interphase – cell’s chromosomes duplicate.

  14. Chromosomes contain the cell’s genetic materials.

  15. Prophase follows Interphase. Source: roche.com

  16. Prophase – Chromatid pairs are now visible and the spindle fibers are beginning to form.

  17. Chromatid – duplicated chromosome coils.

  18. Source: roche.com

  19. Metaphase follows Prophase. Source: roche.com

  20. Metaphase – Chromatid pairs are lined up in the center of the cell.

  21. Source: roche.com

  22. Anaphase follows Metaphase. Source: roche.com

  23. Anaphase – the chromosomes have separated.

  24. Source: roche.com

  25. Telophase follows Anaphase. Source: roche.com

  26. Telophase – It is now obvious that two cells are forming. Source: roche.com

  27. Cytokinesis – the nucleus begins to re-appear. Source: roche.com

  28. Cytokinesis – you now have two cells. Source: roche.com

  29. There’s another type of reproduction.

  30. Sexual Reproduction

  31. Two sex cells come together and form a new organism.

  32. The female produces an egg. The male produces sperm.

  33. The joining of the sperm and egg is called fertilization.

  34. The process of forming sex cells (gametes) is called meiosis.

  35. Meiosis

  36. Meiosis I

  37. Meiosis I The exact same process as Mitosis (except each step ends with a I)

  38. Meiosis II

  39. Prophase II DNA does not make a copy of itself.

  40. Prophase II Chromosomes condense, nuclear membrane breaks down, spindle fibers form.

  41. Prophase II Source: roche.com

  42. Metaphase II Spindles attach to chromatids. Chromatids begin to line-up.

  43. Metaphase II Source: roche.com

  44. Anaphase II Chromatids split, taking ½ of each chromosome.

  45. Anaphase II Source: roche.com

  46. Telophase II Cell membranes starts to pinch off. Cells split, leaving four haploid cells.

  47. Telophase II Source: macroevolution.net

  48. Cytokinesis Cell membranes starts to pinch off. Cells split, leaving four haploid cells.

  49. Cytokinesis Source: roche.com

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