Mitosis.txt

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Author:
jtoner2009
ID:
192786
Filename:
Mitosis.txt
Updated:
2013-01-14 13:47:20
Tags:
bio
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Description:
bio
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  1. What must ococur before successive reproduction?
    growth
  2. Between divisions, cells must?
    grow and replicate their DNA
  3. time of growth and DNA replication between cell divisions
    interphas
  4. G1 (First GAP)
    What occurs?
    growth (transcription and translation)
  5. S phase (synthesis)
    What occurs?
    DNA replication
  6. G2 (second gap)
    What occurs?
    growth (transcription and translation(
  7. A cell iin G2 has 16 DNA molecules in the nucleus. How many DNA molecules will it have in G1?
    8
  8. What does the cell look like in interphase?
    • DNA chromosomes uncoliled (not visible)
    • centrosomes
    • nuclear membrane intact
    • nucleolus visible
  9. When can we actually see DNA?
    M phase
  10. an independent structure of DNA (and protein) that is visible with a light microscope
    chromosomes
  11. A supercoiled DNA molecule that is visible with a DNA molecule
    Chromatid
  12. specialized region of chromosome at which two sister chromatids are held together?
    centromere
  13. When do you have sister chromatids?
    S phase when chromosome duplicates its DNA
  14. How many types of chromosomes can you have?
    • two types
    • 2- chromatid and 1- chromatid chromosomes
  15. What are the steps in prophase?
    • centrioles move apart
    • spindle and aster form
    • chromosoems attach to spindle fibers
    • nucleolus fades
    • nuclear membrane disintegrates
  16. What are the steps in metaphase?
    chromosomes line up along cell equator
  17. What are the steps in anaphase?
    • centromeres uncouple
    • identical chromatids are pulled apart; resultant chromosomes move to opposite poles
  18. If a cell has six chromosomes at metaphsae of mitosis, in anaphase, how many will it have?
    twelve
  19. Telophase is basically what in reverse.
    prophase
  20. What are the steps in telophase?
    • DNA uncoils
    • spindle disintegrates
    • nucleolus reappears
    • nuclear membrane reforms

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