GENETICS Mitosis and the Cell Cycle Cell reproduction

How do little elephants grow up to be BIG elephants?

Three reasons why cells reproduce by asexual reproduction: 1. Growth 2. Repair 3. Replacement

Animated Mitosis Cycle http: //www. cellsalive. com/mitosis. htm As you can see Mitosis is

The Cell Cycle n The sequence of growth and division of a cell. n

Interphase n Growth Stage 1 (G 1) – metabolic activity of the cell n

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

MITOSIS n There are n PROPHASE four phases of mitosis. n METAPHASE n ANAPHASE

Prophase n Nuclear membrane fades n Chromosomes condense – can see sister chromatids and

Prophase Animal Cell Plant Cell Spindle fibers Centrioles Photographs from: http: //www. bioweb. uncc.

Metaphase n Chromosomes line up along the equator (middle) of the cell n Each

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

Anaphase n Centromeres divide n Sister chromatids are pulled apart to opposite poles of

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

Telophase n Spindle fibers dissolve n Chromosomes reach the opposite poles and begin to

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

Cytokinesis n Cytoplasm divides n Two new daughter now separate cells are

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

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GENETICS

Mitosis and the Cell Cycle Cell reproduction

How do little elephants grow up to be BIG elephants?

Why do animals shed their skin?

Three reasons why cells reproduce by asexual reproduction: 1. Growth 2. Repair 3. Replacement Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.

Animated Mitosis Cycle http: //www. cellsalive. com/mitosis. htm As you can see Mitosis is a continuous cycle and does not stop at each phase like shown in the picture.

The Cell Cycle n The sequence of growth and division of a cell. n 95% of cell cycle in interphase n 5% of cell cycle in mitosis

Interphase n Growth Stage 1 (G 1) – metabolic activity of the cell n Synthesis Stage (S) – metabolic activity of the cell, replication of DNA n Growth Stage 2 (G 2) – metabolic activity of the cell, prepare for division

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

MITOSIS n There are n PROPHASE four phases of mitosis. n METAPHASE n ANAPHASE n TELOPHASE

Prophase n Nuclear membrane fades n Chromosomes condense – can see sister chromatids and centromere n Spindle forms n Centrioles start to move to opposite poles

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

Metaphase n Chromosomes line up along the equator (middle) of the cell n Each chromatid is attached to spindle with centromere

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

Anaphase n Centromeres divide n Sister chromatids are pulled apart to opposite poles of the cell n Each chromatid is now a separate chromosome

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

Telophase n Spindle fibers dissolve n Chromosomes reach the opposite poles and begin to uncoil (lengthen) n Nuclear envelopes (2) reform

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

Cytokinesis n Cytoplasm divides n Two new daughter now separate cells are

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase