Cell Cycle 1 1 Three reasons why cells

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Cell Cycle 1 1

Cell Cycle 1 1

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

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. Cell that reproduce by asexual reproduction reproduce constantly.

Animated Cell Cycle http: //www. cellsalive. com/mitosis. htm • Interphase • Prophase • Metaphase

Animated Cell Cycle http: //www. cellsalive. com/mitosis. htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis

Stage 1 - Interphase Longest part of cell life Cell carries out normal activities

Stage 1 - Interphase Longest part of cell life Cell carries out normal activities DNA in long strands called chromatin Centrioles as a pair

Late Interphase Chromatin doubles to form chromosomes (# doubles) • Other cell parts also

Late Interphase Chromatin doubles to form chromosomes (# doubles) • Other cell parts also double • Editing of DNA to repair errors • Centrioles Nucleus CELL MEMBRANE Cytoplasm

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

Stage II- Mitosis Phase # 1 - Prophase Chromosomes coil and become visible •

Stage II- Mitosis Phase # 1 - Prophase Chromosomes coil and become visible • Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. • Nuclear membrane disappears. • Sister chromatids Centrioles Spindle fibers

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

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

Phase # 2 - Metaphase • Chromosomes line up in the middle of the

Phase # 2 - Metaphase • Chromosomes line up in the middle of the cell on the spindle fibers. Centrioles Spindle fibers

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

Phase # 3 - Anaphase • Chromatids (or halves of chromosomes) separate and begin

Phase # 3 - Anaphase • Chromatids (or halves of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

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

Phase # 4 - Telophase Chromatids finish separating. • Nuclear membrane reforms • Chromatids

Phase # 4 - Telophase Chromatids finish separating. • Nuclear membrane reforms • Chromatids unwind and become chromatin. • Nuclei Chromatin Nuclei

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

STAGE III - Cytokinesis Cytoplasm and cell organelles divide evenly • Two new cells

STAGE III - Cytokinesis Cytoplasm and cell organelles divide evenly • Two new cells are formed •

Animal Cell Cycle -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Animal Cell Cycle -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Cell Cycle -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Cell Cycle -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Cell Cycle 19

Cell Cycle 19

The Cell Cycle 20 20

The Cell Cycle 20 20

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

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