Cell Division

Reason

Cells are limited in size!

So the only way to grow is to make more cells

Repair damaged cells

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The Process

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1. Interphase

Cell growth

Copy of genetic material – DNA

Preparation of division

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2. MitosisCell separates DNA

DNA Structure

Chromosomes – Specific clumps of DNA

Humans have 23 pairs

Copied form of DNA (each called chromatid)

Held together by centromere

Ends called telomeres

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2. Mitosis

Prophase

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2. Mitosis

Metaphase

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2. Mitosis

Anaphase

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2. Mitosis

Telophase

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3. Cytokinesis

Cell separates

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3. Cytokinesis

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Cell Cycle

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Human Liver Cell1.What are curved

arrows?2.What stage of cell

cycle is growth?3.How long does

replication occur?4.What stage takes

the most time?

Meiosis

Reproductive cell division

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Meiosis Process

94Males – Females -

Line up of Genes

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