Cell Division By: Anna-Grace Cary

Interphase www.emt.bu.edu

www.microscopy-uk.org.uk

• Spends 90% of its life in this stage• it’s the prep-stage• DNA replicates or makes an exact copy of

itself• Prepares the cell to divide • Spends most of the time growing

• Definition- The cell cycle stage between nuclear divisions, when chromosomes are extended and functionally active. The metabolically active non-dividing stage of the cell cycle

http://groups.molbiosci.northwestern.edu

Mitosis Division of the nucleus

4 phases:1. Prophase

2. Metaphase 3. Anaphase 4. Telophase

Prophase www.cwinstead.com

http://student.ccbcmd.edu/~gkaiser/biotutorials/

• Nuclear membrane & nucleol disappear • Spindle fibers appear(ropes)• Start to see duplicated chromosomes

• Definition-The first stage of cell division, before metaphase, during which the chromosomes become visible as paired chromatids and the nuclear envelope disappearswww.dictionary.com

Metaphase Duplicated chromosomes move to the

middle Sister chromatids on either side

Definition-The second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibers

www.sparknotes.com

www.microscopy.-uk.org.uk

www.dictionary.com

Anaphase

www.clker.com

www.micro.magnet.fsu.edu

• Sister chromatids separate & move to opposite ends

• Each sister chromatids have the same information ad the other one

• Moves away

• Definition-The stage of meiotic or mitotic cell division in which the chromosomes move away from one another to opposite poles of the spindlewww.dictionary.com

Telophase TwoNuclear membrane & nucleolus

reappearChromosomes loosen up &

become chromatin

Definition- The final phase of cell division, between anaphase and interphase, in which the chromatids or chromosomes move to opposite ends of the cell and two nuclei are formed www.blaclspvbiology.50megs.com

www.sparknotes.com

www.dictionary.com

Cytokinesis Division of cytoplasmAlways moving to the next

stage Happens around the same

time as Telophase

Definition- The cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells

www.tutorvista.com

www.micro.magnet.fsu.edu www.dictionary.com

Table Cell Division

Stage 1: Interphase Cell grows DNA replicates Prepares cell to divide Spends 90% of its life in this stage

Stage 2: Mitosis Prophase Spindle fibers appear Nuclear membrane & nucleol disappear

Metaphase Chromosomes move to middleSister chromatids on either side

Anaphase Chromatids separate & move to either end Chromatids contain same information

Telophase Nuclear membrane & nucleol reappearChromosomes loosen up & become chromatids

Stage 3: Cytokinesis Division of cytoplasm Happens around the same time as TelophaseAlways moving to next stage