the cell cycle. dna wraps itself around proteins dna + protein is called chromatin as chromatin...
TRANSCRIPT
![Page 1: The Cell Cycle. DNA wraps itself around proteins DNA + protein is called Chromatin As chromatin condenses… DNA has a Double helix shape visible under](https://reader036.vdocuments.net/reader036/viewer/2022062517/56649f335503460f94c4f9ac/html5/thumbnails/1.jpg)
The Cell Cycle
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DNA wraps itself around proteins
DNA + protein is called Chromatin
As chromatin condenses…
DNA has a Double helix shape
visible under a light microscope.it becomes
This is a naked strand of DNA
Visible, compact chromatin makes up a Chromosome
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This is another look at how DNA is packaged.
Naked DNA
Chromatin
Supercoils
Chromosome
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Centrioles
Centrosome
Centromeres
The three C’s that might confuse you.
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Interphase
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Replicates
Centrosomes
DNA
Chromatin forms supercoils
(“S” stage)
Cell membrane
Cytoplasm
The Cell in Interphase
(“G2” stage)
Nucleolus
Nucleus
“G1” stage
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Mitotic Phase
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MITOSIS
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The Cell in Early Prophase
Chromatin condenses
Chromosomes become visible
Nucleolus disappears
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Nuclear envelope
breaks down
Centrosomes move apart
Spindle fibers form
The Cell in Late Prophase
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METAPHASE
Chromosomes align in middle
of the cell
Spindle fibers attach to
centromeres
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METAPHASE
Under the microscope, chromosomes may appear flat. In the cell however, chromosomes
have a three-dimensional arrangement.
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ANAPHASE
“Free” spindle fibers lengthen; cell elongates
Sister Chromatids
separate and move
apart
Spindle microtubules disintegrate
behind chromatids
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TELOPHASE
Daughter chromosomes
reach centrosomes
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CYTOKINESIS
Cell divides into two identical
daughter cellsNuclear
membrane reforms
TELOPHASE
Mitotic spindle disappears
Nucleoli reappear
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CYTOKINESIS INTERPHASE
New daughter cells
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Mitosis Animated
Click through the next 30 slides to see a rough
animation of the cell cycle.
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The Cell in Interphase
1
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Interphase
2
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Interphase
3
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Interphase
4
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Interphase
5
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Interphase
6
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Interphase
7
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Prophase
8
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Prophase
9
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Prophase
10
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Prophase
11
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Metaphase
12
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Metaphase
13
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Metaphase
14
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Anaphase
15
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Anaphase
16
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Anaphase
17
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Anaphase
18
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Telophase
19
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Telophase
20
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Telophase
Cytokinesis
21
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Telophase
Cytokinesis
22
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Telophase
Cytokinesis
23
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Telophase
Cytokinesis
24
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Telophase
Cytokinesis
25
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Daughter Cells
26
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Daughter Cells
27
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Daughter cells
28
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Interphase
29
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Interphase
30
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MITOTIC EVENTS PRACTICE
IDENTIFY THE MITOTIC EVENTS IN THE SLIDES WHICH FOLLOW
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What mitotic event is shown?
Answer: Anaphase
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What mitotic event is shown?
Answer: Prophase
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What mitotic event is shown?
Answer: Telophase
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What mitotic event is shown?
Answer: Metaphase
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Cell Cycle Organizer
Cell Cycle
Interphase
Mitotic Phase
Mitosis
Cytokinesis
Prophase
G1
SG2
Telophase
MetaphaseAnaphase