3.3.1

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Author:
efrain12
ID:
207484
Filename:
3.3.1
Updated:
2013-03-15 13:52:10
Tags:
bios
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Description:
mitosis and cell cycle
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  1. In Mitosis, after the chromosomes are copied...
    mitosis distributes one chromosome copy to each of two daughter cells
  2. What do mitosis and cytokinesis produce?
    2 cells that are identical to the parent cell
  3. what are the 4 phases that eukaryotic cells go through?
    -G1

    -S

    -G2

    -M
  4. What is mitosis?
    division of genetic material in nucleus that produces daughter cells genetically identical to the parent cell
  5. What is cytokinesis?
    the division of the cytoplasm into the 2 daughter cells
  6. what 3 things can Mitosis go through?
    -growth

    -wound repair

    -cellular respiration
  7. Asexual reproduction AND mitosis
    -asexual reproduction is the basis of mitosis
  8. What is mitosis only involved in?
    production of somatic (body) cells
  9. Mitos (2)
    -thread

    -refers to the condensed chromosomes that become evident when a cell is undergoing mitosis
  10. the two strands on top have identical DNA
  11. preparationo of experiment to find out how long S phase
    -fed radioactive thymidine to cells

    -then waited for hours to see where the cells where
  12. (experiment/thymidine) In the beginning where is the only place where cells have thymidine?
    in S phase
  13. (experiment/thymidine) why was thymidine incorporated only in these 3 cells in S phase?
    These cells were going through DNA synthesis which is the only time which cells can incorporate things in their DNA
  14. (experiment/thymidine) In the beginning would adenosine or cytosine give the same pattern?
    no, they would be present in all the other cells except mitosis because they can be read by RNA
  15. (experiment/thymidine) After 5 mins, are there cells that are going through mitosis and have thymidine?
    no
  16. (experiment/thymidine) After two hours, are there cells that are going through mitosis and have thymidine?
    no
  17. (experiment/thymidine) After 4 hours, are there cells that are going through mitosis and have thymidine?
    no
  18. (experiment/thymidine) After 6 hours, are tehre cells taht are going through mitosis and have thymidine?
    yes
  19. (experiment/thymidine) After 8 hours, are there cells that are going through mitosis and ahve thymidine?
    yes
  20. (experiment/thymidine) After 10 hours, are there cells that are going through mitosis and have thymidine
    yes
  21. (experiment/thymidine) After 12 hours, are there cells that are going through mitosis and have thymidine?
    no
  22. (experiment/thymidine) How long is S-phase?
    8 hours long
  23. (experiment/thymidine) What was the conclusion of the experiment?
    -S-phase is 8 hours long

    • -there is a gap between S phase and M phase
    • *G1 and G2
  24. Does a 4 unreplicated chromosomes have same amount of DNA than 4 replicated chromosomes?
    no, the 4 replicated chromosomes have twice the DNA
  25. How does a G1 cell look like?
    -has 4 unreplicated chromosomes

    (the one in left)
  26. How do chromosomes look like in S phase and G2?
    -has 4 replicated chromosomes

    (the one in right)
  27.  (4)
    -replicacted chromosomes condense at start of mitosis

    -during mitosis, sister chromatids separate 

    -2 daughter cells are formed by citokinesis

    -parent cell has twice as muhc of DNA than one daughter cell
  28. What is a single strand called?
    chromatid
  29. What are sister chromatids?
    two single strands put together

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