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Chapter 9: Cell Continuity

  1. Explain what happens in anaphase?
    • Spindle fibres contract.
    • Chromosomes split at centromere, sister chromatids separate and are pulled to opposite poles.
    • The chromatids are now called daughter chromosomes.
  2. What do the spindle fibres do at anaphase?
    Spindle fibres contract.
  3. What splits at anaphase?
    Chromosomes split at centromere during anaphase.
  4. What do the sister chromatids do at anaphase?
    The sister chromatids separate and are pulled to opposite poles during anaphase.
  5. What changes their name during anaphase?
    The chromatids are now called daughter chromosomes.
  6. Explain what happens at telophase?
    • The chromosomes elongate reverting to chromatin.
    • Two nuclear membranes form.
    • Nucleoli reform.
    • Centrioles replicate.
  7. What elongates at telophase?
    The chromosomes elongate reverting to chromatin.
  8. What forms at telophase?
    Two nuclear membranes form and nucleoli reform.
  9. What replicates at telophase?
    Centrioles replicate at telophase.
  10. What is another word for cytokinesis?
    Cleavage
  11. What happens at cytokinesis? (6)
    • Cytoplasm splits in two.
    • In animal cell: cell membrane constricts, a cleavage furrow is formed, to form 2 cells.
    • In plant cell: vesicles migrate to the equator.
    • These vesicles contain all the cellulose and other chemicals required to make the cell wall and cell membrane.
    • These vesicles fuse to form a cell plate.
    • The cell plate becomes the middle lamella and the cell walls and membrane are laid down each side of it.
  12. What splits in two at cytokinesis?
    The cytoplasm splits in two at cytokinesis.
  13. How is cytokinesis preformed in an animal cell?
    In an animal cell, the cell membranes constrict, a cleavage furrow is formed, to form 2 cells.
  14. In what type of cell is a cleavage furrow formed during cytokinesis?
    In an animal cell.
  15. How is cytokinesis preformed in a plant cell? (4)
    • In a plant cell, vesicles migrate to the equator.
    • Those vesicles contain all the cellulose and other chemicals required to make the cell wall and cell membrane.
    • The vesicles fuse to form a cell plate.
    • The cell plate becomes the middle lamella and the cell walls and membrane are laid down on each side of it.
  16. What migrates to the equator during cytokinesis in a plant cell?
    The vesicles migrate to the equator.
  17. What does the vesicles contain?
    The vesicles contain all the cellulose and other chemicals required to make the cell wall and cell membrane.
  18. What do the vesicles do after migrating to the equator?
    The vesicles fuse to form a cell plate.
  19. What does the cell plate become by the end of cytokinesis in a plant cell?
    The cell plate becomes the middle lamella and the cell walls and membrane are laid down on each side of it.
  20. What is laid down each side of the cell plate?
    The cell walls and membrane are laid down on each side of it.
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jacquelineglynn
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357847
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Chapter 9: Cell Continuity
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