C-Notes: Cell Cycle (Cell Division of Body Cells) Stnd: 2a C-Notes: Cell Cycle (Cell Division of Body Cells) 12/11/2013 Objective: SWBAT identify mitosis in the cell cycle as the results in 2 daughter cells with identical sets of chromosomes.

What is the need of reproduction of cells? It is necessary for the continued survival of a particular group of organisms. All cells arise from other cells by cell division. When cells grow to a certain size they must either divide or die. If a cell continued to grow without dividing, the surface area of the cell would become too small to hold the cell’s contents. Certain drugs have become popular among teens and young adults at dance clubs and raves.

What is Cell Division? a complex series of changes in the nucleus of a cell that leads to the production of two new cells. The 2 new cells are called daughter cells. The nuclei (nucleus) of the daughter cells are usually identical to each other and to that of the parent cell. The daughter cells grow and increase in size until they divide and produce two more daughter cells. This process continues, resulting in an organism growth and reproduction. Certain drugs have become popular among teens and young adults at dance clubs and raves.

What are the stages of the Cell Cycle? Interphase – Growth Phase (Preparation) Mitosis – Cell division of the nucleus Cytokinesis –Cell division of the Cytoplasm Certain drugs have become popular among teens and young adults at dance clubs and raves.

What happens during Interphase? (1st stage Cell Cycle) The period between cell divisions. During interphase, the single-stranded chromosomes (DNA) replicate (make an extra copy). The chromosomes can not be seen during interphase. 3 stages of Interphase: G1 phase - the cell grows in size..  S (Synthesis) phase - the cells DNA replicates  G2 phase – cell continues to grow and carries out protein synthesis and other cellular functions Certain drugs have become popular among teens and young adults at dance clubs and raves.

Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

What happens during Mitosis? (2nd Stage of Cell Cycle) a complex series of changes in the “nuclei” of body cells that produces two identical (same) daughter cells from a single parent cell. The daughter cells have the same number and type of chromosomes as the parent cells. Mitosis is divided into 4 phases: Prophase Metaphase Anaphase Telophase Certain drugs have become popular among teens and young adults at dance clubs and raves.

What happens during Prophase? (1st stage of Mitosis) Nuclear envelope (membrane) begins to disappears Double stranded DNA coils up into chromosomes (becomes Visible) Spindles Apparatus, consisting of fibers, forms from the Centrioles from opposite poles (ends) Nuclear envelope Certain drugs have become popular among teens and young adults at dance clubs and raves.

Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

What happens during Metaphase? (2nd stage of Mitosis) Chromosomes moves towards the middle and line-up at the equator (midline) Nucleus has disappeared completely Certain drugs have become popular among teens and young adults at dance clubs and raves.

Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

What happens during Anaphase? (3rd stage of Mitosis) Double-stranded chromosomes splits at the centromere (middle) and move to opposite poles (ends) of the cell. Certain drugs have become popular among teens and young adults at dance clubs and raves.

Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

What happens during Telophase? (Last stage of Mitosis) Nuclear envelope (membrane) reappears by forming around each set of chromosomes, forming 2 identical nuclei b. Chromosomes uncoil back to chromatin c. Spindles attached to the chromosomes begin to dissolved (disappear) d. Cytokinesis begins (division of cytoplasm to create 2 new daughter cells) Certain drugs have become popular among teens and young adults at dance clubs and raves.

Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

What happens during Telophase? (Last stage of Mitosis) Nuclear envelope (membrane) reappears by forming around each set of chromosomes, forming 2 identical nuclei b. Chromosomes uncoil back to chromatin c. Spindles attached to the chromosomes begin to dissolved (disappear) Cytokinesis begins (last stage of the cell cycle) Certain drugs have become popular among teens and young adults at dance clubs and raves.

What happens during Cytokinesis? (Last stage of the Cell Cycle) division of cytoplasm to create 2 new identical daughter cells Results in one cell becomes two identical daughter cells 2 types of Cytokinesis (different in plants and animals): Plant cells: cell plates forms at the center of the cell and form 2 new daughter cells Animal cells: cleavage furrow forms a ring at the center by pinching the middle of the cell and forming 2 new daughter cells. Certain drugs have become popular among teens and young adults at dance clubs and raves. Cleavage Furrow Cell Plate

The Cell Cycle

IPMATC I Pray More At The Church Interphase Prophase Metaphase Anaphase Telophase Cytokinesis I Pray More At The Church

Animal Mitosis -- Review Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                              Cytokinesis                                                             

Plant Mitosis -- Review Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                              Cytokinesis                                                             

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