Cell CycleCell CycleChapter 2Chapter 2

Cell CycleCell Cycle 3 Steps3 Steps

Interphase Interphase

cell growth and developmentcell growth and development

MitosisMitosis

cell reproduction creating 2 new nucleicell reproduction creating 2 new nuclei

CytokinesisCytokinesis

cell reproduction finishes cell reproduction finishes

creating 2 new cellscreating 2 new cells

http://www.teachersdomain.org/asset/lsps07_int_devdance/

Preview Cell DivisionPreview Cell Divisionhttp://www.iknow.net/player_window.html?url=media/cell_cycle_intro_auto.swf&width=360&height=28http://www.iknow.net/player_window.html?url=media/cell_cycle_intro_auto.swf&width=360&height=2855Cell Cycle, Animal Mitosis, & Plant MitosisCell Cycle, Animal Mitosis, & Plant Mitosis

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http://highered.mcgraw-hill.com/sites/0073031216/student_view0/exercise13/mitosis_movie.htmlhttp://highered.mcgraw-hill.com/sites/0073031216/student_view0/exercise13/mitosis_movie.html

http://www.teachersdomain.org/asset/tdc02_vid_dnadivide/http://www.teachersdomain.org/asset/tdc02_vid_dnadivide/

http://www.layyous.com/Videoclips/mitosis.htmhttp://www.layyous.com/Videoclips/mitosis.htm

http://www.phschool.com/science/biology_place/labbench/lab3/mitfilm.htmlhttp://www.phschool.com/science/biology_place/labbench/lab3/mitfilm.html

Phases of the Cell CyclePhases of the Cell Cycle

Vocabulary PreviewVocabulary Preview

Cell CycleCell Cycle InterphaseInterphase MitosisMitosis

ProphaseProphase MetaphaseMetaphase AnaphaseAnaphase TelephaseTelephase

CytokinesisCytokinesis

Homologous Homologous ChromosomeChromosome

Daughter CellDaughter Cell Sister ChromatidSister Chromatid CentromereCentromere Cell PlateCell Plate

InterphaseInterphase

Chromosomes in the nucleus are like a bunch of spaghetti noodles.

For each chromosome there is an identical chromosome.

This pair is called homologous chromosomes.

Humans have 23 pairs of homologous chromosomes.

Phase in InterphasePhase in Interphase

Scientists have established that interphase Scientists have established that interphase has three phases G1, S, and G2.has three phases G1, S, and G2.

Interphase - G1Interphase - G1

Interphase - SInterphase - S

G2G2

MitosisMitosis

Mitosis is a continuous process.Mitosis is a continuous process. PMATPMAT It is made up of 4 phasesIt is made up of 4 phases

ProphaseProphase MetaphaseMetaphase AnaphaseAnaphase TelophaseTelophase

PMATPMAT

ProphaseProphase

The first phase of mitosis is Prophase.

1) Chromosomes (DNA) twist (condense) into tight coils

2) Nucleus breaks apart

MetaphaseMetaphase

During Metaphase, all the chromosomes that are attached to the fibers move to the middle of the cell.

The pairs line up end to end, across the center of the cell.

“Meet in the middle”

AnaphaseAnaphaseDuring Anaphase, The chromosomes are pulled apart making 2 sister chromatids.

The sister chromatids are pulled to opposite sides of the cell

http://www.copernicusproject.ucr.edu/ssi/HSBiologyResources.htm

TelophaseTelophase

During Telophase, a new nuclear membrane forms around the separated chromatids making 2 identical nuclei in 1 cell.

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

CytokinesisCytokinesis

CytokinesisCytokinesis