Metaphase
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Metaphase. Prophase. Works Cited. Mitosis. Definitions. Telophase. Anaphase. Prophase(prophase and Prometaphase). Back. Prophase 1 st step of Mitosis Chromatin condenses into chromosomes

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Prophase

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Prophase

Metaphase

Prophase

Works

Cited

Mitosis

Definitions

Telophase

Anaphase


Prophase prophase and prometaphase

Prophase(prophase and Prometaphase)

Back

  • Prophase

    • 1st step of Mitosis

    • Chromatin condenses into chromosomes

    • Two chromosomes are created, thanks to the genetic material created in the “S” step of the Cell Cycle

  • Prometaphase

    • Microtubules enter the nuclear space

    • Each chromosome forms 2 kinetochores at the centromere


Metaphase

Metaphase

Back

  • Centromeres of opposing chromatids meet at the metaphase plate

    • In some types of cells chromosomes do not line up at the metaphase plate, rather they hover back and forth between poles randomly.

  • If a kinetochore becomes unattached from its microtubules, it will generate a signal, preventing a premature leap to anaphase (the mitotic spindle checkpoint)


Anaphase

Anaphase

Back

  • The proteins holding together the sister chromatids are broken down, separating them.

  • The new chromosomes are then pulled apart by shortening kinetochores to their respective sides.


Telophase

Telophase

Back

  • Essentially a reversal of prophase/prometaphase.

  • The newly separated chromosomes fuse with opposite ends of the cell.

  • Using pieces of the parent cell’s membrane, a new nuclear membrane is created around the chromosomes

  • The newly created nuclei now unfold back into chromatin.


Definitions

Definitions

Home

  • Kinetochores – the protein structure on chromosomes where spindle fibers attach during division to pull chromosomes apart.

  • Metaphase Plate – an imaginary line on the chromatid that is equidistant from the two centrsome poles

  • Mitotic Spindle Checkpoint – the point at which a cell undergoing mitosis stops so that kinetochores may attach completely before continuing to anaphase.


Click on a picture from the right to learn about the phase

Click on a picture from the right to learn about thephase.

Works

Cited

Home

Prophase, Metaphase, and Anaphase in an animal cell.


Works cited

Works Cited

Home

  • http://www.accessexcellence.org/RC/VL/GG/images/MITOSIS2.gif

  • http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%20101%20Laboratory/Mitosis/mitosis.htm

  • http://www.mhhe.com/biosci/pae/botany/botany_map/articles/images/bm_05-03.gif

Plant cell mitosis


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