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The Cell Cycle & Cell Division. The Cell Cycle. http://www.nobel.se/medicine/laureates/2001/press.html. Animated Cycle. http://www.cellsalive.com/cell_cycle.htm. Animal Cell DNA replicated Organelles replicated Cell increases in size. Plant Cell DNA replicated Organelles replicated

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The cell cycle cell division

The Cell Cycle & Cell Division


The cell cycle
The Cell Cycle

http://www.nobel.se/medicine/laureates/2001/press.html


Animated cycle
Animated Cycle

http://www.cellsalive.com/cell_cycle.htm


Interphase the cell prepares for division g 1 s g 2

Animal Cell

DNA replicated

Organelles replicated

Cell increases in size

Plant Cell

DNA replicated

Organelles replicated

Cell increases in size

InterphaseThe cell prepares for division (G1, S, G2)


Interphase
Interphase

Plant Cell

Animal Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm



Mitosis1
Mitosis

The process of cell division which results in the production of two daughter cells from a single parent cell.

The daughter cells are identical to one another and to the original parent cell.


Mitosis can be divided into stages
Mitosis can be divided into stages

  • Prophase

  • Metaphase

  • Anaphase

  • Telophase & Cytokinesis


Prophase the cell prepares for nuclear division

Animal Cell

DNA coils into chromosomes

Plant cell

DNA coils into chromosomes

ProphaseThe cell prepares for nuclear division


Prophase
Prophase

Plant Cell

Animal Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm


Metaphase the cell prepares chromosomes for division

Animal Cell

Chromosomes line up at the center of the cell

Spindle fibers attach from daughter cells to chromosomes at the centromere

Plant Cell

Chromosomes line up at the center of the cell

Spindle fibers attach from daughter cells to chromosomes at the centromere

MetaphaseThe cell prepares chromosomes for division


Metaphase
Metaphase

Plant Cell

Animal Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm


Anaphase the chromosomes divide

Animal Cell

Spindle fibers pull chromosomes apart

½ of each chromosome (called chromotid) moves to each daughter cell

Plant Cell

Spindle fibers pull chromosomes apart

½ of each chromosome (called chromotid) moves to each daughter cell

AnaphaseThe chromosomes divide


Anaphase
Anaphase

Plant Cell

Animal Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm


Telophase cytokinesis the cytoplasm divides
Telophase/CytokinesisThe cytoplasm divides

Animal Cell

DNA spreads out

2 nuclei form

Cytokinesis: Cell membrane pinches in to form the 2 new daughter cells

Plant Cell

DNA spreads out

2 nuclei form

Cytokinesis: New cell wall forms between to nuclei to form the 2 new daughter cells


Telophase

Cytokinesis


Telophase
Telophase

Plant Cell

Animal Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm


Mitosis animation
MitosisAnimation

http://www.cellsalive.com/mitosis.htm






Meiosis1
Meiosis

Meiosis is thetype of cell division by which gametes (sex cells: eggs and sperm) are produced.

One parent cell produces four daughter cells.

Daughter cells have half the number of chromosomes found in the original parent cell


Meiosis2
Meiosis

During meiosis, DNA replicates once, but the nucleus divides twice.


Meiosis3
Meiosis

  • There are 2 parts of meiosis

    • Meiosis 1

    • Meiosis 2


Meiosis i
Meiosis I

First division of meiosis


Meiosis 1
Meiosis 1

  • Prophase 1: Each chromosome duplicates and remains closely associated. These are called sister chromatids. Homologous chromosomes will cross over

  • Metaphase 1: Chromosome pairs align at the middle of the cell.

  • Anaphase 1: Chromosome pairs are pulled apart with sister chromatids remaining together.

  • Telophase 1: Two daughter cells are formed with each daughter containing only one chromosome of the chromosome pair.


Prophase i
Prophase I

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Prophase i1
Prophase I

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Metaphase i
Metaphase I

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Telophase i
Telophase I

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Meiosis4

Meiosis

Second Division of Meiosis


Second division of meiosis
Second Division of Meiosis

  • Prophase 2: DNA does not replicate. The cell prepares for Meiosis 2

  • Metaphase 2: Chromosomes line up in the middle of the cell

  • Anaphase 2: Centromeres divide and sister chromatids move separately to each pole (or side) of the cell.

  • Telophase 2: 4 nuclei begin to form and the two cells begin to pinch into 4 cells

  • Cytokinesis: Cell division is complete and four haploid daughter cells are formed

    .


Prophase ii
Prophase II

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Metaphase ii
Metaphase II

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Telophase ii
Telophase II

http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html


Meiosis5
Meiosis

http://www.biosci.uga.edu/almanac/bio_103/notes/apr_3.html.


Meiosis animation
Meiosis Animation

http://www.rothamsted.bbsrc.ac.uk/notebook/courses/guide/movie/meiosis.htm


Differences in mitosis meiosis

Mitosis

Asexual

Cell divides once

Two diploid daughter cells

Genetic information is identical

Meiosis

Sexual

Cell divides twice

Four haploid daughter cells

Genetic information is different

Differences in Mitosis & Meiosis


Comparison animations
Comparison Animations

http://www.pbs.org/wgbh/nova/baby/divi_flash.html

http://www.usoe.k12.ut.us/curr/science/sciber00/7th/genetics/sciber/animatin.htm


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