Post on 22-Jan-2016
description
transcript
Bryan Tappen
CELL CYCLE/CELL DIVISION
INTERPHASE
• Cell growth occurs
• Chromatin is elongated and not visible
• Distinct nucleus
• DNA replication takes place
• Cell appears to be resting
http://faculty.ccbcmd.edu/courses/bio141/lecguide/unit6/genetics/DNA/DNArep/images/interphase1_pc.jpghttp://emt.bu.edu/em610/em610_ol_spring_2008/yanti/interphase_text.JPG
PROPHASE • Chromosomes become visible
• Nuclear membrane breaks down
• Centrioles and spindle fibers appear
http://indi.blogs.com/indica/images/mitosis1Prophase.jpg
http://www.cwinstead.com/prophase1.jpg
Metaphase
Chromosomes line up in the middle of the cell
Spindle fibers attach to the centromere of the chromosomes
http://media.smithsonianmag.com/images/HeLa-cells-metaphase-stage-2.jpg
http://upload.wikimedia.org
ANAPHASE
• Duplicated chromosomes separate
• Spindle fibers shorten pulling single chromosomes away from each other
• Cytoplasm division begins
www.uic.edu/classes/bios/bios100/lecturesf04am/anaphase1m.jpg
http://morganterhune3a.edublogs.org/files/2011/11/anaphase-q9m62s.jpg
TELOPHASE
http://www.broadinstitute.org/bbbc/BBBC018
http://www.edupic.net/cells.htm
Nuclear membrane starts to reformChromosomes begin to uncoil and become less visibleCytoplasm division occurring
CYTOKINESIS • The division of the cytoplasm
• Different in the plant and animal cells
• Plant cells, cells reach cell wall
• Animal cells, cells do no reach cell wall
http://www.sparknotes.com/biology/cellreproduction/mitosis/section3.rhtmlhttp://www.edupic.net/cells.htm
Cell cycleInterphase Cell growth occurs
Prophase Chromosomes became visible
Metaphase Chromosomes line up in the middle of the cell
Anaphase Duplicated chromosomes separate
Telophase Nuclear membrane begins to reform
cytokinesis The division of the cytoplasm