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Phases of Mitosis

Match the phase with a description.

TermDefinition
Interphase - Before S Phase *DNA is long, thin, thread-like chromatin. *One pair of centrioles/centrosome.
Interphase - After S Phase *DNA has duplicated forming sister chromatids joined at the centrosome. *Centriole pair/centrosome has duplicated.
Mitosis - Prophase *DNA begins to thicken and condense. *Centriole pairs/centrosomes begin to migrate to opposite poles with spindle fibers forming between them. *Nuclear membrane and nucleolus beginning to dissolve.
Mitosis - Prometaphase *Centriole pairs/centrosome further moved towards opposite poles. *Nuclear membrane further dissolves and nucleolus is gone. *Spindle fibers attach to chromosomes and begin to move towards equator.
Mitosis - Metaphase *Chromosomes aligned along the equator. *Spindle fibers/mitotic spindle fully formed.
Mitosis - Anaphase *Spindle fibers shorten and pull apart sister chromatids and drag them to opposite poles. *The cell elongates. *Separated sister chromatids are now considered chromosomes.
Mitosis - Telophase *Nuclear membrane begins to form around the two sets of chromosomes. *Spindle fibers disassemble. *Cleavage furrow (animal cells) or cell plate (plant cells) form to separate the two daughter cells. This signals the beginning of cytokinesis.
Created by: eclairekelley
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