BIOL 404-Exam 4-Reproduction 5

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kyleannkelsey
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215650
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BIOL 404-Exam 4-Reproduction 5
Updated:
2013-04-24 20:53:44
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BIOL 404 Exam Reproduction
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BIOL 404-Exam 4-Reproduction 5
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  1. What is the Pachytene step?
    The step in prophase I where recombination occurs, increasing genetic diversity
  2. What step in meiosis creates greater diversity?
    Pachytene of prophase I
  3. What are the five stages of Prophase I?
    • Leptotene
    • Zygotene
    • Pachytene
    • Diplotene
    • Diakinesis
  4. Leptotene, Zygotene, Pachytene, diplotene and Diakinesis are steps in what process?
    Prophase I of Meiosis
  5. What are precursor cells to meiosis?
    Spermatagonia
  6. What step in meiosis is reductionary?
    First meiosis
  7. What step of meiosis do you reduce the number of chromatids per cell?
    Meiosis 2
  8. What step of meiosis do you reduce the number of chromosomes per cell?
    Meiosis I
  9. What are the three parts of a sperm?
    • Head piece
    • Midpiece
    • Tail (Flagellum)
  10. How would you describe the movement of the sperms flagellum?
    Thrashing
  11. What is the name of the sperm head that contains digestive enzymes for accessing the ovum?
    Acrosome
  12. Where is the nucleus found in the sperm?
    In the head
  13. What cellular organelles line the sperms flagellum?
    Mitochondria
  14. How long do sperm live in the reproductive tract?
    1-2 days
  15. What do sperm do during the 1-2 days they are in the reproductive tract?
    Continuously move towards the ovum
  16. What two hormones are controlling Seritoli cells?
    • Testosterone
    • FSH
  17. What two hormones are driving spermatogenesis?
    FSH and Testosterone
  18. During hot conditions, what would you expect to change in male reproduction?
    Decreased fertility and spermatogenesis errors
  19. What connects Sertoli cells?
    Tight junctions

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