Mitosis

Four Mitotic Stages
Pro phase
Meta phase
Ana phase
Telo phase

Prophase

Steps in Prophase
DNA coils tightly & becomes visible as chromosomes

Prophase continued
2. Membrane around nucleus disappears
3. Nuceolus disappears
4. Centrioles migrate to poles
5. Spindle begins to form
* the job of the spindle is to attach to the middle of each chromosome and pull the chromatids apart
* (see next slide for image of spindle)

Mitotic Spindle

Eukaryotic Chromosome At the point in the center of the chromosome, labeled kinetochore, fibers attach in order to pull the two halves apart.

Human Chromosomes

Steps in Metaphase
Spindle fibers from centrioles attach to each chromosome
Cell preparing to separate its chromosomes
Cell aligns its chromosomes in the middle of the cell
Remember: meta = middle

Metaphase Chromosomes lined up at the equator Asters at the poles Spindle Fibers

Metaphase

Steps in Anaphase
Cell chromosomes are separated
Spindle fibers shorten so chromosomes pulled to ends of cell

Anaphase

Anaphase Sister chromatids being separated

Steps in Telophase
Separation of chromosomes completed
Cell Plate forms (plants)
Cleavage furrow forms (animals)
Nucleus & nucleolus reform
Chromosomes uncoil

Telophase Plant Animal

Cytokinesis
Means division of cytoplasm and all organelles within
Occurs after chromosomes separate
Forms two, identical daughter cells

Cytokinesis Cell Plate Forming in Plant Cells

Cytokinesis Cleavage furrow in animal cell Cell plate in animal cell

Stages of M phase of cell cycle

Put the following in the correct order:

Mitosis

by Amy Allen

Accessibility

Categories

Upload Details

Usage Rights

2 Embeds 6

Statistics

Mitosis Presentation Transcript

http://blendedschools.blackboard.com	5
http://nl.blendedschools.blackboard.com	1