MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic...
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![Page 1: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/1.jpg)
MITOSIS
the key to growth
![Page 2: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/2.jpg)
Mitosis - the division of the nucleus into two equal sets of genetic informationBasically, simple cell division
![Page 3: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/3.jpg)
Mitosis is part of the Cell Cycle
The cell cycle is divided into 5 phases.1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase
**This is a moving, continuous process. Stages are for study.
The Cell Cycle
Interphase
Mitosis
Cytokinesis
Mitosis
![Page 4: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/4.jpg)
Interphase Period of growth and normal
cell activityEvents of Interphase:•90% of the cell life.•DNA is in the form of chromatin.•DNA replicates, making two exact copies of each chromosome.•2 centrioles appear.
Stages of interphase:• G1 (Gap 1) – normal cell growth•S (Synthesis) – DNA synthesis (replication)•G2 (Gap 2) – prepares for cell division
![Page 5: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/5.jpg)
Look for a distinct nucleus
Interphase
![Page 6: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/6.jpg)
Mitosis: Prophase
Three things happen:
Chromatin coils and become visible chromosomes.
The nuclear membrane breaks down and disappears
The spindle fibers & centrioles forms
![Page 7: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/7.jpg)
Mitosis: ProphaseLook for chromosomes in the center
![Page 8: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/8.jpg)
Mitosis: MetaphaseChromosomes line up on the “equator” (in the middle of the cell)
Chromatids attach to the spindle fibers at the centromere
![Page 9: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/9.jpg)
Mitosis: MetaphaseLook for chromosomes lined up on the “equator”
![Page 10: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/10.jpg)
Mitosis: Anaphase
Chromosomes pull apart in opposite directions towards the “poles”
This phase ends when the chromosomes reach the poles.
![Page 11: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/11.jpg)
Mitosis: AnaphaseLook for chromosomes in two groups pulling apart
![Page 12: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/12.jpg)
Mitosis: TelophaseThe fourth and final phase of mitosis
The opposite of Prophase
Chromosomes unwind to form chromatin
Two new nuclei form with new membranes
The spindle disappears
![Page 13: MITOSIS the key to growth. Mitosis - the division of the nucleus into two equal sets of genetic information Basically, simple cell division.](https://reader030.fdocuments.us/reader030/viewer/2022032707/56649e545503460f94b4b9b0/html5/thumbnails/13.jpg)
Mitosis: TelophaseLook for two groups of chromosomes with a cell plate or cleavage furrow
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CytokinesisThe division of the cytoplasm
Animal cells pinch inward forming a cleavage furrow.
Plant cells divide from the inside towards the outside by forming a cell plate which becomes the cell wall.
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Cytokinesis
Animals:Cleavage furrow
Cell plate cell wall
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Differences in plant and animal cells:summary
Animals Plants
centrioles no centrioles
cleavage furrow cell plate
cell wall