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How do CELLS REPRODUCE? Mitosis: asexual reproductions Meiosis: sexual reproduction Analyze how cells grow and reproduce in terms of.

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Presentation on theme: "How do CELLS REPRODUCE? Mitosis: asexual reproductions Meiosis: sexual reproduction Analyze how cells grow and reproduce in terms of."— Presentation transcript:

1 How do CELLS REPRODUCE? Mitosis: asexual reproductions Meiosis: sexual reproduction Analyze how cells grow and reproduce in terms of

2 Chromosomes are located in the nucleus of a cell containing tightly spindled DNA. Analyze how cells grow and reproduce in terms of Chromatid is a single chromosome

3 Mitosis Cell Division Analyze how cells grow and reproduce in terms of

4 Mitosis Q: How do organisms Grow? A1: Make Larger Cells A2: Make More Cells Review: Cell Theory- All cells come from pre-existing cells. Analyze how cells grow and reproduce in terms of

5 Mitosis  Your cells are dividing, growing, dying all the time.  Your body produces billions of cells.  Cells divide, specialize, form tissues, organize into organs, work together to form organ systems.  Part of you that is always undergoing Mitosis: Skin, Blood Cells Analyze how cells grow and reproduce in terms of

6 Parts of the Plant that are always dividing for growth: Roots and Stem Analyze how cells grow and reproduce in terms of

7 Mitosis – Cell Division – Asexual Reproduction  Cells divide into 2 new identical cells. 5 Phases of Mitosis Interphase Prophase Metaphase Anaphase Telophase Analyze how cells grow and reproduce in terms of

8 Mitosis – Cell Division – Asexual Reproduction Interphase Prophase Metaphase Anaphase Telophase ***Your description will go here!!! Analyze how cells grow and reproduce in terms of ***Your pictures will go here!!!

9 Cell Cycle is the sequence of stages through which a cell passes between one cell division.  The Analyze how cells grow and reproduce in terms of

10 Cell Cycle is the sequence of stages through which a cell passes between one cell division. G1SG2 Growth phaseReplication of DNA Replication Organelles and Growth of mitosis The cell cycle 3 phases of Interphase  The Analyze how cells grow and reproduce in terms of

11 Interphase  1 st stage: G1, S, and G2 in each.  When cell prepares for division.  Chromosomes duplicate!!!  Cell grows  Some do not count this as the first stage of mitosis! Analyze how cells grow and reproduce in terms of

12 Prophase  Chromosomes are visible.  Nucleus begins to break apart. Analyze how cells grow and reproduce in terms of

13 Metaphase  Chromosomes line up along the center of the cell.  MIDDLE! Analyze how cells grow and reproduce in terms of

14 Anaphase  Duplicated Chromosomes pull away from each other. Analyze how cells grow and reproduce in terms of

15 Telophase  2 New cells form.  Cell division completes Analyze how cells grow and reproduce in terms of

16 Cytokinesis  2 New cells form.  Cell division completes  Cytokinesis occurs (new cell wall forms or cell membrane is pinched in) Analyze how cells grow and reproduce in terms of

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20 Remember! Mitosis is Asexual. Mitosis is for growth and repairing old, dead cells. Mitosis occurs throughout the body. Mitosis stages are IPMAT. Mitosis begins with 1 cell & ends with 2 identical cells! Analyze how cells grow and reproduce in terms of

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22 Cancer  Result of Uncontrolled Cell division in Mitosis.  From environmental factors, changes in enzymes that regulate cell division, & genetics.  Second leading cause of death in the U.S. Analyze how cells grow and reproduce in terms of

23 Cancerous Cells  Cells divide, and keep dividing.  This forms masses of tissue called a Tumor. Analyze how cells grow and reproduce in terms of

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26 Educational Public Service Announcement/Brochure  You are an oncologist (scientist who studies cancer) & you would like to educate the public about cancer so that they may make healthful choices in their lives. Please include: 1. The cause of cancer at the cell level. 2. Types of cancer that are most common in the U.S. 3. General environmental causes of cancer. 4. Preventative actions one can take (this should be the largest & most important section of the brochure. Be Creative, Informative, Clear, & Specific See your book: pages Analyze how cells grow and reproduce in terms of

27 = Sexual Reproductio n Diploid Cell – full set of chromosome s Same as Mitosis 2 daughter cells are identical to parent cell. Chromosomes do NOT duplicate here. Each cell divides- chromosomes separating randomly! The Result: 4 daughter cells with ½ the number of chromosomes needed for an individual. Haploid Cells – ½ set of chromosomes Also called Gametes Ex. Sperm, egg, pollen Analyze how cells grow and reproduce in terms of

28 Eggs are created Sperm are create d Resulting Cell when 2 gametes fuse = Fertilization Analyze how cells grow and reproduce in terms of

29 MEIOSIS: cell division necessary for reproduction. Analyze how cells grow and reproduce in terms of

30 meiosis Analyze how cells grow and reproduce in terms of

31 Meiosis :Cell division for sexual reproduction. Cells are located in the testes (males) females(ovaries) Analyze how cells grow and reproduce in terms of

32 Meiosis: IPMAT cytokinesis 2 nd phase of PMAT producing 4 (haploid- single)daughter cells III ProphaseSynapsis occurs and crossing over of chromosomes same MetaphasePairs of chromosomes line in the plates 2 celled-pair of chromosomes line in the plates AnaphaseHomologous pairs separate Sister chromatids seperates TelophaseDivision occurs Analyze how cells grow and reproduce in terms of

33 Meiosis  Function: creates gametes (sperm, egg, pollen) for sexual reproduction.  From one Gamete forming cell – 4 daughter cells are formed.  Haploid cells are created – which have ½ the number of chromosomes as the parent or normal body cells. Analyze how cells grow and reproduce in terms of

34 Mistakes in Meiosis Genetic Recombination: AKA Crossing Over  Occurs during meiosis, chromosomes actually cross over each other, genetic material gets switched!  This leads to genetic variability!  Can be an endless number of different chromosomes possible! Analyze how cells grow and reproduce in terms of

35 Mistakes in Meiosis  Non-Disjunction  Failure of Chromosomes to separate properly during meiosis.  Result: Zygote will have extra chromosomes or too few chromosomes.  Most Zygotes will not survive. Analyze how cells grow and reproduce in terms of

36 Non-Disjunction  In humans, a person with an extra 21 st chromosomes will have Down’s Syndrome Analyze how cells grow and reproduce in terms of

37 Mitosis vs. Meiosis Analyze how cells grow and reproduce in terms of MitosisMeiosis Function Type of Reproduction # of Cells Produced Type of Cell Produced # of Cellular Divisions # of Chromosomes in Daughter cells

38 Analyze how cells grow and reproduce in terms of

39 Mitosis vs. Meiosis Analyze how cells grow and reproduce in terms of MitosisMeiosis Function Create new cells for growth & replace old cells Create gametes for sexual reproduction Type of ReproductionAsexualSexual # of Cells Produced24 Type of Cell ProducedDiploidHaploid # of Cellular Divisions12 # of Chromosomes in Daughter cells Same as parent cell½ as parent cell


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