Reproduction of cells;Mitosis

The stage of the cell cycle where the nucleus divides

The stage of the cell cycle where the cell PREPARES to divide

G1, S, G2,

• A.chromatin condenses to into visible chromosomes
• B. Mitotic Spindle form in cytoplasm between centriole pairs; lengthens as microtube grows.

• A. Nuclear Envelope fragments
• B. Mitotic Spindle invades Nucleus
• C. Microtubules bind chromatids at kinetochores

• A. Centrosomes at opposite ends of cell
• B. Chromosomes (attached to MT's) line up at metaphase plate (center of cell)

• Sister chromatids seperate and are pulled toward opposite poles.
• Kinetochore MT's shorten at the ends
• Motor proteins "walk" along MT's to pull chromatids
• non - kintochore MT's get longer and slide past each other

• A. Nuclear envelope reform (now two sepertare nuclei)
• B. Chromosomes partly unfold
• Cytokinesis (start during telophase)

Microfilaments under plasma membrane princh in; form cleavage fullow to squeeze cell in half

Duplicated chromosomes has 2 sister chromotids attacted at the centromere

Rectangular structures that are copied during the late part of interphase; pull on spindle fibers

Two of them make up a chromosome

• Interphase, usually takes 18 hours
• The M phase takes about 6 hours
• It takes a cell one day to divide

The metaphase is the longest phase of mitosis