Eukaryotic Cell Reproduction Interphase, Mitosis, and Cytokinesis.

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Presentation transcript:

Eukaryotic Cell Reproduction Interphase, Mitosis, and Cytokinesis

Interphase Cell is carrying out all life functions plus storing energy for mitosis Each chromosome is duplicated which forms chromatids Chromatids: identical copies of a chromosome, held together at centromere

Prophase 1 st phase of Mitosis Nuclear membrane dissolves Chromosomes condense and start to move towards center of cell Centrioles move to opposite sides of cell Mitotic spindle fibers form between the centrioles

Metaphase 2 nd Stage of Mitosis Mitotic spindle fibers attach to the centromeres of each pair of chromosomes The chromosomes are lined up along the equator of the cell

Anaphase 3 rd Stage of Mitosis Chromatids separate at the centromere Each chromatid is pulled to a pole of the cell by the mitotic spindle fibers

Telophase Last Stage of Mitosis Nuclear membranes form around the two sets of chromosomes Chromosomes unwind Mitotic fibers disappear Mitosis is now complete

Cytokinesis Eukaryotic cells without a cell wall, cell membrane pinches inward and eventually all the way through to form the two daughter cells In eukaryotic cells with a cell wall, a cell plate forms in the middle of the cell to divide the two cells.

What Did You Learn? How are binary fission and mitosis similar? How are they different? Why is it important for chromosomes to be copied before cell division? What would happen if cytokinesis occurred without mitosis?