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Cell Cell DivisionDivision
Cell Division: MitosisCell Division: Mitosis
• Object: Object:
To study the various stages in To study the various stages in mitotic divisionmitotic division
•In eukaryotes, cell division In eukaryotes, cell division occurs in two major stages.occurs in two major stages.
•The first stage, division of The first stage, division of the cell nucleus, is called the cell nucleus, is called mitosismitosis..
•The second stage, division of The second stage, division of the cell cytoplasm, is called the cell cytoplasm, is called cytokinesiscytokinesis..
Cell Cell DivisionDivision
ChromosoChromosomesmes
•Genetic information is Genetic information is passed from one passed from one generation to the next on generation to the next on chromosomeschromosomes..
•Before cell division, each Before cell division, each chromosome is chromosome is duplicatedduplicated, or , or copiedcopied..
ChromosoChromosomesmes
• Each Each chromosome chromosome consists of two consists of two identical identical “sister” “sister” chromatids.chromatids.
• Each pair of Each pair of chromatids is chromatids is attached at an attached at an area called the area called the centromere.centromere.
Sister chromatids
Centromere
Cell DivisionCell Division
Cell Cell CycleCycle
MitosiMitosiss
• MitosisMitosis– Biologists divide the events of Biologists divide the events of
mitosis into four phases:mitosis into four phases:•ProphaseProphase•MetaphaseMetaphase•AnaphaseAnaphase•TelophaseTelophase
MitosisMitosis
Spindle Spindle formingforming
Chromosomes Chromosomes (paired (paired
chromatids)chromatids)
CentromereCentromere
MitosisMitosis ProphaseProphase
Spindle formingSpindle forming
CentromereCentromereChromosomesChromosomes
(paired chromatids)(paired chromatids)
ProphaseProphase
CentrioleCentriole
CentrioleCentriole
SpindleSpindle
MetaphaseMetaphase
CentrioleCentriole
SpindleSpindle
MetaphaseMetaphase
Individual Individual chromosomeschromosomes
AnaphaseAnaphase
IndividualIndividualchromosomeschromosomes
AnaphaseAnaphase
Nuclear Nuclear envelope envelope reformingreforming
TelophaseTelophase
TelophaseTelophase
CytokinesisCytokinesis
CytokinesisCytokinesis
Cytokinesis in PlantsCytokinesis in Plants
Cell wallCell wallCell plateCell plate
InterphaseInterphase
Animal Cell Plant Cell
ProphaseProphase
Animal Cell Plant Cell
MetaphaseMetaphase
Animal Cell Plant Cell
AnaphaseAnaphase
Animal Cell Plant Cell
TelophaseTelophase
Animal Cell Plant Cell