MITOSIS Cell division in which one cell divides

MITOSIS Cell division in which one cell divides to produce two cells identical to each other and to the original cell Each new cell has the same number chromosomes as the parent cell

POINTS TO REMEMBER: • All cells divide • All SOMATIC cells are formed by mitosis • Mitosis results in growth of multicellular organisms • TWO cells result from mitotic division of a cell • Resulting cells are IDENTICAL to each other and original cell

INTERPHASE • Period between cell division • 90% of cell’s life • Cell is growing and metabolizing • DNA replicates • NO CHROMOSOMES VISIBLE

PROPHASE • 1 st stage of cell division • Chromosomes become visible • Nucleus disintegrates • Centrioles move to opposite sides of cell & begin forming the spindle

METAPHASE • Spindle is complete • Chromosomes attach to spindle by centromere • chromosomes line up single file in middle of cell

ANAPHASE • Replicated chromosomes separate into chromatids • Each chromatid is pulled to opposite sides of cell

TELOPHASE • Chromatids have reached opposite sides of the cell • The cell begins to pinch inward (forms a furrow) • Cytoplasm begins to divide • Nuclei begin to reform

CYTOKINESIS • Late stage of Telophase • Cytoplasm divides • forming TWO new cells each containing the same number of chromosomes as the original cell

Plant Mitosis is a little different than in animal cells