Ch 6 Section 3
Mitosis and Cytokinesis
Mitosis
 The chromatids are moved to opposite ends
(poles) of the cell
 Done with spindles
 Centrioles and microtubules
 Centrioles migrated to the poles and tubules
connect to the chromatids like a cable
 Microtubules shorten pulling the chromatids
apart forming chromosomes
 Has to happen quickly 2 million RBC/sec
 Math lab p 129
Phases of Mitosis
1. Prophase
1.
2.
3.
Chromosomes form
Nuclear membrane dissolves
Spindles form
2. Metaphase
1. Chromosomes align single file along the equator
3. Anaphase
1. Chromatids pulled apart and move to poles
4. Telophase
1. Nuclear membrane reforms at each pole
2. Chromosomes uncoil
Early Prophase/
Late Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
 Cytoplasm divided into two new cells
 Works like cinching a belt tight in most
animal cells
 Plant cells different due to having a cell
wall
 Cell plate grows between the two new nuclei
 Either way the new cells enter G1 of
interphase
PROPHASE
BACK
METAPHASE
BACK
ANAPHASE
BACK
TELOPHASE
BACK