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Different Stages Of Mitosis

Published in: Biology | Science | Zoology
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This presentation describes about the different stages of mitosis (Interphase, Prophase, Metaphase, Anaphase, Telophase)

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    INTERPHASE • During late interphase, the nucleus is well defined and surrounded by the nuclear envelope. • It contains one or more nucleoli. • Just outside the nucleus are two centrosomes, formed duirng early interphase by replication of a single centrosome. • Microtubules extend from the centrosomes in a radial array called asters. • The chrosomsomes have already duplicated but are still in the form of loosely packed chromatin fibers.
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    Centrioles (Two Pairs) Chromatin Plasma Membrane Interphase Nucleolus Nuclear Envelope
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    PROPHASE During the prophase the nucleoli in the nucleus disappear. The chromatin fibers become tightly ccoiled and condense into chromosomes. Chromosomes line up in pairs and are joined at the centromere. In the cytoplasm, the spindle fibers begin to form and are made of microtubules. The centrosomes move away from each other, propelled by the lengthening microtubules, or spindle fibers, between them
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    Nuclear envelope Centromere ith attached kinetochore Separating centrosomes Mitotic spindle Microtubules Condensed chromosomes
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    METAPHASE The centromes are at opposite ends Of the cell poles. The chromosom es are lined up at the 'metaphase plate', an imaginary line equidistant between the two poles. The centromeres of the chromosomes are all aligned with one another. The chromatids are of each chromosomes are attached to a microtubule which form the spindle.
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    Spindle Metjphase r------Metaphase plate Metaphase Thick, coiled chromosomes are lined up in the center of the cell on the metaphase plate. Spindle fibers are attached to the chromosomes.
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    ANAPHASE The paired chromosomes separate. They move along the microtubules toward opposite poles Of the cell. The poles move farther apart. By the end of anaphase, the two poles of the cell each have a complete set of chromosomes.
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    Ana hase Chromosomes break at centromeres, and sister chromatids move to opposite ends ofthe cell Sister chromatids Anaphase The
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    TELOPHASE The microtubules become even longer, and daughter nuclei begin to form at the two poles of the cell. Nuclear envelopes are formed, the nucleoli reappear, the chromatin of the chromosomes uncoils. Mitosis is now complete: one nucleus has divided into two genetically identical nuclei. Cytokinesis follows and involves the formation of a cleavage furrow, which pinches the cells in two
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    Cleavage furrow polar microtubules Centre-game so roes Re-forming nuclear envelope Decondensing chromosomes Conn plete oc4ear Cent raciile Telophase


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