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Meiosis

Meiosis is a specialized cell division that occurs in the gonads, with the primary purpose of producing gametes containing a haploid number of chromosomes. Unlike mitosis, meiosis involves two divisions (meiosis I and II) but only one round of DNA replication. It introduces genetic variation through the random assortment of maternal and paternal chromosomes and crossing-over during homologous chromosome pairing in the first meiotic division. Understanding these processes is crucial for grasping heredity and genetic diversity.

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Meiosis

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  1. Meiosis • Meiosis occurs in the gonads. Its main function is to produce gametes with a haploid number of chromosomes. Meiosis differs from mitosis in three ways. Cells divide twice in meiosis, but the DNA only replicates once. Second, meiosis distributes a random mixture of maternal and paternal chromosomes. Finally, homologous chromosomes pair up side-by-side in the first meiotic division in a process called crossing-over.

  2. Interphase

  3. Interphase

  4. Prophase 1

  5. Prophase 1

  6. Prophase 1

  7. Prophase 1

  8. Metaphase 1

  9. Metaphase 1

  10. Metaphase 1

  11. Metaphase 1

  12. Metaphase 1

  13. Anaphase 1

  14. Anaphase 1

  15. Anaphase 1

  16. Anaphase 1

  17. Anaphase 1

  18. Anaphase 1

  19. Telophase 1

  20. Telophase 1

  21. Telophase 1

  22. Telophase 1

  23. Telophase 1

  24. Telophase 1

  25. Prophase 2

  26. Prophase 2

  27. Metaphase 2

  28. Metaphase 2

  29. Metaphase 2

  30. Metaphase 2

  31. Metaphase 2

  32. Metaphase 2

  33. Anaphase 2

  34. Anaphase 2

  35. Anaphase 2

  36. Anaphase 2

  37. Anaphase 2

  38. Anaphase 2

  39. Telophase 2

  40. Telophase 2

  41. Telophase 2

  42. Contributions • Colin- Meiosis 1, Prophase 2 • Griffin- Metaphase 2, Anaphase 2, Prophase 2, Introductory paragraph

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