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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

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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


Mitosis

MITOSIS


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


The cell cycle cell division

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


The cell cycle cell division

Animal Mitosis -- Review


The cell cycle cell division

Plant Mitosis -- Review


Cell cycle review

Cell Cycle Review


Meiosis

MEIOSIS


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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