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Mitosis vs. Meiosis Mitosis Somatic (body) cell division – the basis of growth in our bodies o Produces genetically identical daughter cells (same amount of chromosomes) Phases o Interphase = DNA duplicates, then cell will rest until it is ready to proceed to mitosis Centriole duplicates and centrosomes move to opposite sides of the cell o Prophase = centrosomes produce spindle fibers Nucleus disappears while the nuclear membrane dissolves to free the condensed DNA (chromosomes) => will re-appear later o Metaphase = chromosomes attach to the spindle fibers and move to the center of the cell => called the metaphase plate o Anaphase = spindle fibers pull the chromosomes apart to opposite sides of the cell o Telophase = mitosis is completed Nucleus re-forms around each pair of chromosomes at the opposite sides of the cell o Cytokinesis = the cell pinches off into 2 genetically identical daughter cells Not a part of mitosis Meiosis Reproductive cell division – the basis of genetic reproduction o Produces genetically varied daughter cells o sperm and egg cells End result = each daughter cell has half the number of chromosomes (23) o sperm (23) + egg (23) = zygote (developing offspring) (46)