What is Mitosis? Mitosis: Cell division involving somatic (non- sex) cells Involves only diploid cells Form of asexual reproduction for some life (bacteria & protista, fungi) End Result: Two genetically identical “daughter cells”

The Cell Cycle Defined: Repeating set of events in the life of a cell 1) Interphase –G1, S, G2 2) Prophase 3) Metaphase 4) Anaphase 5) Telophase mitosis

Interphase Divided into 3 Stages: G1 Stage –Normal function performed –Cell growth –Organelles created S Stage –Chromatin (DNA strands) duplicated G2 Stage –Cell growth –Normal function performed

Prophase 1 st Mitosis Stage Chromatin (DNA strands) coils into chromosomes Nucleus dissolves spilling the chromosomes Spindle fibers form

Metaphase 2 nd stage of mitosis Spindle fibers attach to centromeres of each chromosome Spindle fibers pull the chromosomes to the cell’s equator

Anaphase 3 rd stage of mitosis Spindle fibers rip apart the chromosomes –1 chromatid pulled to each direction

Telophase 4 th stage of mitosis Spindle fibers dissolve Cytokinesis occurs (splitting of cytoplasm) Nucleus reforms Chromatids unwind into chromatin End result: 2 identical diploid cells

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Name that Stage! Hint: Chromosomes are aligned in middle of cell

Name that Stage! Hint: Cell plate is splitting the cell

Name that Stage! Hint: Two normal looking nuclei of two cells

Name that Stage! Hint: Chromosomes are forming and the nucleus is gone

Name that Stage! Hint: Chromatids are being pulled apart

Name this stage of the cell cycle.

Mitosis A Quick Overview

Kobe Kuiz 1)In order, name the 5 stages of the cell cycle. 2)Pick a stage of the cell cycle. Name two things that happen in this stage. 3)Review the picture slides. Identify the stages based on the picture. 4)The division of the cytoplasm is called _____. 5)Which cells divide by mitosis? 6)During which interphase stage is DNA created? 7)During which stage do spindle fibers form? 8)During which stage are chromosomes aligned in the middle? 9)During which stage are chromatids separated? 10)During which stage does the nucleus dissolve?