The Cell Cycle Cell Division The Cell Cycle

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The Cell Cycle & Cell Division

The Cell Cycle & Cell Division

The Cell Cycle http: //www. nobel. se/medicine/laureates/2001/press. html

The Cell Cycle http: //www. nobel. se/medicine/laureates/2001/press. html

Animated Cycle http: //www. cellsalive. com/cell_cycle. htm

Animated Cycle http: //www. cellsalive. com/cell_cycle. htm

MITOSIS

MITOSIS

Mitosis The part of cell division which results in two identical daughter cells from

Mitosis The part of cell division which results in two identical daughter cells from a single parent cell.

Cell Division can be divided into stages • Interphase • Prophase • Metaphase •

Cell Division can be divided into stages • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis

Interphase The cell prepares for division • Animal & Plant Cell – DNA replicated

Interphase The cell prepares for division • Animal & Plant Cell – DNA replicated (copied) – Makes new organelles (synthesis) – Cell increases in size (growth)

Interphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Interphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Prophase The cell prepares for nuclear division • Animal & Plant Cell – Chromosomes

Prophase The cell prepares for nuclear division • Animal & Plant Cell – Chromosomes appear – Centrioles separate & spindles form – Nuclear envelope disappears – LONGEST phase in mitosis

Prophase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Prophase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Metaphase: The cell prepares chromosomes for division • Animal & Plant Cell – Chromosomes

Metaphase: The cell prepares chromosomes for division • Animal & Plant Cell – Chromosomes line up at the middle of the cell – Spindle fibers attach to chromosomes at the centromere – SHORTEST phase of mitosis

Metaphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Metaphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Anaphase The chromosomes divide • Animal & Plant Cell – Spindle fibers pull chromosomes

Anaphase The chromosomes divide • Animal & Plant Cell – Spindle fibers pull chromosomes apart – ½ of each chromosome (called chromatid) moves to poles of cells

Anaphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Anaphase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Telophase The cytoplasm divides • Animal Cell – DNA uncoils & appears as chromatin

Telophase The cytoplasm divides • Animal Cell – DNA uncoils & appears as chromatin again – 2 nuclei form – Cell membrane pinches in to form the 2 new daughter cells • Plant Cell – DNA uncoils & appears as chromatin again – 2 nuclei form – New cell wall forms between two nuclei to form the 2 new daughter cells

Telophase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

Telophase Animal Cell Plant Cell Photographs from: http: //www. bioweb. uncc. edu/biol 1110/Stages. htm

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

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

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Cytokinesis • Division of the cytoplasm- creating 2 new cells • Begins in telophase

Cytokinesis • Division of the cytoplasm- creating 2 new cells • Begins in telophase • In animals- look for cleavage furrow • In plants- look for a cell plate • Review

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