Chapter 9 BIO 103

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jblack212
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241892
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Chapter 9 BIO 103
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2013-10-21 14:50:59
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BIO 103
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Chapter 9 Biology 103
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  1. What is the purposes of Cell Division?
    • -Reproduction
    • -Growth and repair
    • -maintains surface area to volume ration
    • -allows for specailization
  2. What does Binary Fission do in prokaryotes?
    • -Replication of chromosomes
    • -Elongation of the cell
    • -Separation of the chromosomes
    • -In growth of the plasma membrane
    • -Formation of the cell wall and separation
  3. What is the difference between chromatin and chromosomes?
    • Chromatin-thin threads and is found in a nondividing cell
    • Chromosomes-the are coiled and condensed and are found in dividing cell
  4. Charistic number of chromosomes-
    each species has this
  5. Diploid-
    full compliment of chromosomes, found in somatic body cells, 2N
  6. Haploid-
    Half diploid number, only sex cells, N
  7. Replication of DNA-
    occurs prior to cell division
  8. Sister chromatids-
    the two identical members of a replicated chromosome
  9. Centromere-
    constriction where sister chromatids are held together
  10. Centrioles-
    barrel shaped organelles found in animal cells
  11. Centrosome-
    Microtuble organizing center
  12. Stages of cell cycle-
    Repeating steps of cell growth and division
  13. G1-
    1st growth phase-organelles increase in number and the cell grows
  14. S-
    DNA replication
  15. G2-
    2nd growth phase- manufacture of proteins and enzymes needed for cell division
  16. M-
    division of the nucleus
  17. Cytokinesis-
    division of the cytoplasm
  18. Chracteristics of Cancer cells-
    • lack differentiation-immature
    • have abnormal nuclei
    • do not undergo apoptosis- cell death
    • form tumors-growths
    • undergo metastasis-spread, new blood vessels
  19. Mitosis-
    • -Nuclear division in which chromosome number stays the same.
    • -Produces¬†2 daughter cells, each with the diploid number of chromosomes
    • -Each daughter cell receives the same number and same kind of chromosomes as were present in the mother cell
  20. Prophase-
    • DNA already replicated.
    • -Nuclear envelope breaks down
    • -Nucleolus disappears
    • -Chromosomes condense with no oriantation
    • -spindle apparatus begins to form
  21. Metaphase-
    • -Chromosomes align at the metaphase plate
    • -Spindle apparatus is full formed and attached to the chromosomes at the centromere
  22. Anaphase-
    • -Centromeres divide, chromatids separate, chromosomes move to the poles
    • -Cytokinesis begins with a cleavage furror
  23. Telophase-
    • -Nuclear envelope reforms
    • -Nucleolus reappears
    • -Chromosomes unwind
    • -Spindle Apparatus breaks down
  24. Mitosis in plant cells-
    same as animal cells but instead of a cleavage furrow, vesicles from the Golgi apparatus form a cell plate, becomes a plasma membrane into cell wall
  25. Division of cytoplasm and organelles is_______.
    in exact
  26. Mitosis results in ___ daughter cells with the ______ diploid number of chromosomes; they are genetically__________.
    2. diploid. identical.

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