Science Starter Create a KWL chart on what you know, want to know, and want to learn about cellular reproduction

Cell Cycle (Mitosis) SPI (Plant Cell Division) I can: Model the movement of chromosomes during plant cell division. SPI (Plant Cell Division) I can: Model the movement of chromosomes during plant cell division.

Observation Activity / You will be split into 10 groups / At each station there is a booklet with a microscope slide inside a pouch / You will first read the information in the booklet before you view the image in the microscope / After you read the info and view the picture under the microscope, draw an image of what you see. Don’t forget to label your image with the correct phase of the cell cycle / The slides are numbered, make sure your slide isn’t upside down when you view it or your images will be backwards / Once you are done, place the microscope slide back in the booklet pouch / Everyone is doing this on their OWN paper / You will be split into 10 groups / At each station there is a booklet with a microscope slide inside a pouch / You will first read the information in the booklet before you view the image in the microscope / After you read the info and view the picture under the microscope, draw an image of what you see. Don’t forget to label your image with the correct phase of the cell cycle / The slides are numbered, make sure your slide isn’t upside down when you view it or your images will be backwards / Once you are done, place the microscope slide back in the booklet pouch / Everyone is doing this on their OWN paper

How do little elephants grow up to be BIG elephants?

Why do animals shed their skin?

Brain Pop / As animals grow they pass through different stages in life. Cells, just like animals pass through different stages in their life cycle / The life cycle of a cell is called the Cell Cycle / As animals grow they pass through different stages in life. Cells, just like animals pass through different stages in their life cycle / The life cycle of a cell is called the Cell Cycle

The cell cycle begins when the cell is formed and ends when the cell divides and forms new cells Before a cell divides it must make a copy of its DNA. The DNA is organized into structures called chromosomes Copying chromosomes ensures that each new cell will be an exact copy of its parent cell.

Chromosome Structure Centromere Centromere-the point on a chromosome by which it is attached to a spindle fiber during cell division

Chromosome Structure 1 chromatid So 1 chromatid + 1 chromatid = 1 Chromosome

Science Starter / What are 3 reasons why cells reproduce ?

Cell Cycle (Mitosis) SPI (Plant Cell Division) I can: Model the movement of chromosomes during plant cell division. SPI (Plant Cell Division) I can: Model the movement of chromosomes during plant cell division.

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.

Chromosome Structure Centromere Centromere-the point on a chromosome by which it is attached to a spindle fiber during cell division

Chromosome Structure 1 chromatid So 1 chromatid + 1 chromatid = 1 Chromosome

Cell Cycle 6 phases / Interphase / Prophase / Metaphase / Anaphase / Telophase / Cytokinesis / Interphase / Prophase / Metaphase / Anaphase / Telophase / Cytokinesis Phases of Mitosis

The Complete Cell Cycle

Spot the differnce

Interphase occurs before mitosis begins Chromosomes are copied (# doubles) Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase Chromosomes are copied (# doubles) Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm

Interphase THE CELL:  grows to it ’ s mature size / makes a _____ of its DNA / prepares to _______ into two cells THE CELL:  grows to it ’ s mature size / makes a _____ of its DNA / prepares to _______ into two cells Copy Divide

InterphaseInterphase Animal Cell Plant Cell Photographs from:

Prophase 1 st step in Mitosis Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers

Prophase / the __________ condenses (gets thicker) to form chromosomes, which are two chromatids attached by a ____________. / _______ fibers stretch out to opposite ends of the cell / the nucleus breaks down / the __________ condenses (gets thicker) to form chromosomes, which are two chromatids attached by a ____________. / _______ fibers stretch out to opposite ends of the cell / the nucleus breaks down Chromatin Centromere Spindle

Prophase Animal Cell Plant Cell Photographs from: Spindle fibers Centrioles

Metaphase 2 nd step in Mitosis Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

Metaphase / the __________ line up in the middle of the cell / spindle fibers attach to the __________ of the chromosomes / the __________ line up in the middle of the cell / spindle fibers attach to the __________ of the chromosomes Chromosomes Centromere

spot the difference

Metaphase Animal Cell Plant Cell Photographs from:

Anaphase 3 rd step in Mitosis Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

Anaphase / ____________ split and the chromatids separate / chromatid to opposite ends of the cell being pulled by the ___________ / the cell begins to become stretched out / ____________ split and the chromatids separate / chromatid to opposite ends of the cell being pulled by the ___________ / the cell begins to become stretched out Centromeres Spindle Fibers

Anaphase Animal Cell Plant Cell Photographs from:

Telophase 4th s tep in Mitosis Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods). Mitosis ends. Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods). Mitosis ends. Nuclei Chroma tin

Telophase  the __________ reappears – two nuclei but one cell / chromosomes begins to loosen up (start to become string again) / A nuclear membrane appears around each set of chromosomes  the __________ reappears – two nuclei but one cell / chromosomes begins to loosen up (start to become string again) / A nuclear membrane appears around each set of chromosomes Nucleus

Telophase Animal Cell Plant Cell Photographs from:

Telophase / Telophase is the last step of Mitosis but the cell cycle isn’t done just yet / The next step is the division of the cytoplasm of the cell. This step is called Cytokinesis

spot the differnce

Cytokinesis occurs after mitosis Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

Cytokinesis / the cell divides and two new ___________ cells are formed / chromosomes loosen up and become chromatin again / the cell divides and two new ___________ cells are formed / chromosomes loosen up and become chromatin again Daughter

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

REMEMBER!REMEMBER! I Interphase P Prophase M Metaphase A Anaphase T Telophase C Cytokinesis I Interphase P Prophase M Metaphase A Anaphase T Telophase C Cytokinesis IPMATC I Pray M ore At T he Church