Mitosis

= division of the nucleus and its contents Mitosis = division of the nucleus and its contents - discovered by Walther Flemming in 1882

Phases of Mitosis

1) Prophase - DNA coils to become chromosomes - nuclear membrane disappears - microtubules called spindle fibers grow from centrioles to center of cell

Prophase Centrioles Nucleus with Chromosomes Spindle Fibers

Late Prophase Kinetochore Fibers Polar Fibers

2) Metaphase - chromosomes line up in center

Metaphase

3) Anaphase - chromosomes pull apart and move to opposite sides of cell

Anaphase

4) Telophase - chromosomes uncoil - nuclear membrane reforms

Telophase Chromosomes Uncoil New Nuclear Membrane Forms

Phases of Mitosis

How do you remember the order of the phases of Mitosis? Just remember this phrase……….

PMAT PEE MATT P = Prophase M = Metaphase A = Anaphase T = Telophase

Cytokinesis - cell membrane forms a cleavage furrow and cytoplasm divides - in plants, a cell plate forms between each cell

Cytokinesis Cleavage Furrow