Download The Cell Cycle

*
Cell growth,
function, and
*cell size demonstration
*
*
*the processes by which a cell
grows, functions, and divides
*Division occurs in order to:
*control cell size
*repair damaged cells
*replace old cells
*
*Majority of cell cycle:
Interphase
*3 stages:
*G1 (GAP)Cell growth
*S phase(Synthesis)
DNA is replicated
*G2 (GAP2) Cell
prepares for division
*Cyclins
*
*A chromosome is a single long
strand of DNA. The DNA is
packaged by histones (proteins)
bound to it.
http://micro.magnet.fsu.edu/cells/nucleus/chromatin.html
*Centromere: a central constricted region
called that serves as an attachment point for
the machinery of mitosis.
http://ghr.nlm.nih.gov/handbook/basics/chromosome https://sites.google.com/site/mrsebiology97/cell-reproduction/2-o
*Interphase
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
*Prophase
Animal Cell
Plant Cell
Spindle fibers
Centrioles
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
*Metaphase
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
*
* The chromosomes are pulled apart
by the spindle, which is made of
microtubules. The spindle fibers
are attached to each centromere
(which is part of the chromosome),
and anchored on the other end to
a centrosome (which is the
organizing center for the spindle).
* There are 2 centrosomes, one at
each end of the spindle. The
chromosomes are lined up
between the poles of the spindle.
* When the spindle fibers contract,
the chromosomes are pulled to the
opposing poles.
*Anaphase
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
*Telophase
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Animal Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
Plant Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
*Cell Cycle
16
*
* During Prophase I, _________ chromosomes pair up together (
called _____________).
* The FOUR chromatids together are called a _________.
*
*
http://www.biologyjunction.com/images/modcrossingover.jpg
http://www.phschool.com/science/biology_place/labbench/lab3/images/crossovr.gif
* During synapsis, some segments of the chromatids that are
touching __________ genes.
* A ________is a segment of DNA that codes for a specific
protein.
* This exchanging of genes is called ________________________.
*
* During Metaphase I, the _________ line up in the center.
* During Anaphase I, one of each homologous chromosomes
moves to a different end of the cell.
*
http://www.bio.georgiasouthern.edu/bio-home/harvey/lect/images/comparison.
http://www.biology.iupui.edu/biocourses/n100/images/meiosis2cropped.
http://www.biology.iupui.edu/biocourses/n100/images/meiosis2cropped.jpg