Parts of Model• Nuclear Membrane: 2 small string tied in a circle• Cell Membrane: Large string tied in a circle• Spindle Fibers: Colored string (4 dark blue)• Chromatin/Chromatid: Yarn (2 multicolored)• Chromosomes: 4 colors of pipe cleaners (4 pairs)• Centrioles: 2 straw pieces

Interphase• Cell is in normal function• Nucleus is visible• Nuclear membrane is intact• DNA replicates (chromosomes are

copied, # is doubled) • G1 phase• Synthesis (chromatin is

replicated)

Prophase• Mitosis begins• Cell begins to divide• Nuclear membrane dissolves• Centrioles (poles) appear and

move to opposite sides of the cell• Spindle fibers form between the

centrioles (poles)

Metaphase • chromosomes attach to spindle fibers• Spindles line chromosomes up in the

center of the cell

Anaphase • Chromosomes separate and

begin to move to opposite ends of the cell

Telophase • Chromosomes uncoil into

chromatin• Nuclear membrane re-forms (2

new nuclei formed)• Mitosis ends

Cytokinesis• Cells completely divide into two

individual daughter cells• Each daughter cell has the exact

same chromosomes as the parent cell• 2 new cells return to interphase