by: anna-grace cary. interphase uk.org.uk spends 90% of its life in this stage it’s the...
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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