mitosis. interphase not technically part of mitosis cell spends 99% time in this phase dna exists in...
TRANSCRIPT
![Page 1: Mitosis. Interphase Not technically part of mitosis Cell spends 99% time in this phase DNA exists in ___________ form Cell performs…..? * Most important](https://reader036.vdocument.in/reader036/viewer/2022081603/56649e355503460f94b23a00/html5/thumbnails/1.jpg)
Mitosis
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Interphase• Not technically part of
mitosis• Cell spends 99% time
in this phase• DNA exists in
___________ form• Cell performs…..?
* Most important Fact …
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Prophase
Events of Prophase
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Prophase
• Is the cell to the left a human cell?
• How many chromosomes are pictured?
• Are the chromosomes normal size or duplicated?
• Which pieces of DNA are identical to each other?
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Metaphase
• The duplicated chromosomes line up along the “equator” of the cell.
• What causes them to move?
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Metaphase
• How many chromosomes are pictured?
• Are the two red “X”s identical to each other?
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Anaphase
• Spindle fibers split the duplicated chromosomes in half.
• The identical chromatids are separated from each other…. But now they are normal sized chromosomes!
• Will the two daughter cells be genetically identical?
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Telophase
• Telophase is called “reverse prophase” because…..
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Telophase
In telophase, cytokinesis occurs.
Cytokinesis -
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Telophase
Q: Are the two daughter cells genetically identical to each other????
Clones -
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MITOSIS – BIG IDEAS
• Occurs in all eukaryotic organisms
• Each chromosome is copied. (how?)One copy of each chromosome is distributed to both daughter cells.
• Thus All body cells contain full set of chromosomes (therefore full set of genes)
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Questions
When do cells mitose?
What determines when cells start and stop mitosing?
Can you think of a medical condition in which you would like human cells to mitosis, (but they normally don’t)?