Mitosis A Type of Cell Division Mitosis One

Mitosis • One human cell eventually multiplies to several hundred trillion producing a human

• Cells become ready for mitosis by making copies of their DNA, this

The Phases of Mitosis • The phases of mitosis include, prophase, metaphase, anaphase and

Importance of Mitosis: • • • Growth Repair Replacing dead and damaged cells Asexual

Interphase (Resting stage) • Chromosomes cannot be seen • Chromosomes duplicate and double in

Prophase nuclear membrane chromatids centromere disappearing • Chromosomes become visible • Each chromosome consists

Metaphase • Chromosomes line up at the equator (centre of the cell) • Spindles

Anaphase • Sister chromatids separate as individual chromosomes • They move apart towards the

Telophase nuclear membrane forming • Chromosomes gradually disappear • Nuclear membrane is forming around

Cytoplasmic division • Division of cytoplasm Animal cells : by formation of cleavage furrow

Can you identify the different stages of mitosis from the diagram below? anaphase interphase

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

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Mitosis A Type of Cell Division

Mitosis • One human cell eventually multiplies to several hundred trillion producing a human being. This process is called MITOSIS. • It is the event that ensures that every cell in your body has the identical set of genetic instructions or DNA.

• Cells become ready for mitosis by making copies of their DNA, this process is called replication. • Each double stranded chromosome contains two chromatids, joined by a centromere.

The Phases of Mitosis • The phases of mitosis include, prophase, metaphase, anaphase and telophase. • Cells spend most of their time in interphase.

Importance of Mitosis: • • • Growth Repair Replacing dead and damaged cells Asexual reproduction To ensure that each daughter cell maintains exactly the same number and kind of chromosomes as the parent cell. • Produces two identical daughter cells

Interphase (Resting stage) • Chromosomes cannot be seen • Chromosomes duplicate and double in number

Interphase Animal cell Plant cell

Prophase nuclear membrane chromatids centromere disappearing • Chromosomes become visible • Each chromosome consists of two identical chromatids homologous chromosomes

Prophase Animal cell Plant cell

Metaphase • Chromosomes line up at the equator (centre of the cell) • Spindles are formed to attach to the centromere of each chromosome

Metaphase Animal cell Plant cell

Anaphase • Sister chromatids separate as individual chromosomes • They move apart towards the opposite poles chromosomes

Anaphase Animal cell Plant cell

Telophase nuclear membrane forming • Chromosomes gradually disappear • Nuclear membrane is forming around each set of chromosomes

Telophase Animal cell Plant cell

Cytoplasmic division • Division of cytoplasm Animal cells : by formation of cleavage furrow Plant cells : by formation of cell plate cleavage cellfurrow plate

Can you identify the different stages of mitosis from the diagram below? anaphase interphase telophase metaphase prophase

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