EASY21

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shantel2201
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144699
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EASY21
Updated:
2012-03-29 22:19:35
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EASY 21
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EX.14, GUIDED NOTES MITOSIS BIOLOGY
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  1. WHAT ARE THE AJOR PHASES OF THE CELL CYCLE?
    • (C) CYTOKINESIS
    • (G1) GAP1
    • (S) SYNTHESIS
    • (G2) GAP2
  2. WHY IS THE SYNTHESIS PHASE NECESSARY IN THE CELL CYCLE?
    S- PHASE, THE DNA COMPOSING THE CHROMOSOMES IS DUPLICATED. AT THE END OF THE S PHASE EACH CHROMOSOME CONSISTS OF AN IDENTICAL PAIR OF CHROMOSOMAL DNA STRANDS, CALLED SISTER CHROMATIDS, ATTACHED AT A CENTROMERE
  3. WHAT ARE THE MAJOR PARTS OF A EUKARYOTIC CHROMOSOME?
    Eukaryotic chromosomes consist of a DNA-protein complex that is organized in a compact manner which permits the large amount of DNA to be stored in the nucleus of the cell. The subunit designation of the chromosome is chromatin. The fundamental unit of chromatin is the nucleosome.
  4. WHAT DOES A CELL LOOK LIKE DURING INTERPHASE
  5. WHAT IS OCCURRING DURING PROPHASE IN ANIMAL CELLS AND WHAT DOES THE CELL LOOK LIKE?
    • During prophase, the chromatin condenses and the chromosomes become visible. Also the nucleolus disappears, the nuclear membrane fragments, and the spindle appartus forms and attaches to the centromeres of the chromosomes. These are dividing cells from a whitefish. Early prophase can be seen. The chromatin is condensing into chromosomes and the nuclear envelope has not yet fragmented.
  6. WHAT IS OCCURRING DURING METAPHASE IN ANIMAL CELLS AND WHAT DOES THE CELL LOOK LIKE?
    • During metaphase, the nuclear membrane fragmention is complete and the duplicated chromosomes line up along the cell's equator. These are dividing cells from a whitefish.
  7. WHAT IS OCCURRING DURING TELOPHASE IN PLANT CELLS, AND WHAT DOES THE CELL LOOK LIKE?
    • During telophase, the effects of prophase and prometaphase (the nuclear membrane and nucleolus disintegrating) are reversed. Two daughter nuclei form in the cell. The nuclear envelopes of the daughter cells are formed from the fragments of the nuclear envelope of the parent cell. As the nuclear membrane forms around each pair of chromatids, the nucleoli reappear. The chromosomes also unwind back into the chromatin they are supposed to be. Telophase accounts for approximately 2% of the cell cycle's duration.
  8. WHAT IS OCCURRING DURING TELOPHASE IN ANIMAL CELLS, AND WHAT DOES THE CELL LOOK LIKE?
  9. WHAT IS OCCURING DURING PROPHASE IN PLANT CELLS, AND WHAT DOES THE CELL LOOK LIKE?
    During prophase, the chromatin condenses and the chromosomes become visible. Also the nucleolus disappears, the nuclear membrane fragments, and the spindle appartus forms and attaches to the centromeres of the chromosomes. These are dividing cells in the roor tip of an onion plant. Early and late prophase can be seen. In late prophase, the chromatin has condensed into chromosomes, the nucleolus is gone, and the nuclear envelope has been removed.
  10. WHAT IS OCCURING DURING METAPHASE IN PLANT CELLS AND WHAT DOES THE CELL LOOK?
    During metaphase, the nuclear membrane fragmention is complete and the duplicated chromosomes line up along the cell's equator. These are dividing cells in the roor tip of an onion plant. They two samples have been stained differently.
  11. WHAT IS OCCURRING DURING ANAPHASE IN PPLANT CELLS, AND WHAT DOES THE CELL LOOK LIKE?
    During anaphase, diploid sets of daughter chromosomes separate and are pushed and pulled toward opposite poles of the cell. This is accomplished by the polymerization and depolymerization of the microtubules that help to form the spindle apparatus. These are dividing cells in the roor tip of an onion plant.
  12. WHAT IS OCCURRING DURING ANAPHASE IN ANIMAL CELLS AND WHAT DOES IT LOOKS LIKE?
    SISTER CHROMOTIDS SEPERATE AND INDIVUAL CHROMOSOMES MOVE TOWARD POLES AS KINETOCHORE MICROTUBLES SHORTEN. POLAR MICROTUBLES LENGTH AND PUSH POLES APART.

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