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Mitosis

Stages of mitosis

AB
cytokinesisThe cell membrane pinches in around the middle of the cell. Eventually, the cell pinches in two. Each daughter cell ends up with the same number of identical chromosomes and about half the organelles and cytoplasm.
telophaseThe chromosomes begin tostretch out and lose their rodlike appearance. This occurs in the two regions at the ends of the cell. A new nuclear membrane forms around each region of chromosomes.
interphaseThe cell grows to its mature size, makes a copy of its DNA, and prepares to divide into two cells.
anaphaseThe centromeres split. The two chromatids separate. One chromatid moves along the spindle fiber to one end of the cell. The other chromatid moves to the opposite end. The cell becomes stretched out as the opposite ends pull apart.
prophaseThe chromatin in the nucleus condenses to form chromosomes. Structures called spindle fibers form a bridge between the ends of the cell. The nuclear membrane breaks down.
metaphaseThe chromosones line up across the center of the cell. Each chromosome attaches to a spindle fiber at its centromere, which still holds the chromatids together.


8th Grade Science Teacher
Thunder Bay Junior High

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