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CHROMOSOMES AND CELL REPRODUCTION

CHROMOSOMES AND CELL REPRODUCTION. About 2 trillion cells are produced by you every day Per second?. About 25 million. Egg/Sperm  “ Zygote ”  Embryo  Fetus  Baby. “ Cell Division ” “ Cell Reproduction ”. THE CELL CYCLE. = sequence of growth and division.

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CHROMOSOMES AND CELL REPRODUCTION

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  1. CHROMOSOMES AND CELL REPRODUCTION

  2. About 2 trillion cells are produced by you every day Per second? About 25 million Egg/Sperm  “Zygote” Embryo  Fetus  Baby

  3. “Cell Division” “Cell Reproduction”

  4. THE CELL CYCLE = sequence of growth and division - Interphase - Mitosis 2 Stages?

  5. G1

  6. S DNA Replication Exact copies of Chromosomes **DNA must be copied then distributed

  7. DNA Gene= a segment of DNA that codes for a protein Gene Genes  You

  8. Chromosome DNA Gene Chromosome = consists of DNA tightly coiled around proteins

  9. Single? 46 # Pairs? 23 “Somatic cells” (body cells) HUMANS

  10. Why pairs? Diploid = 2n Mom Dad Gene   Gene Gene   Gene Pair 1-22 = Autosomes Gene   Gene Gene   Gene Pair 23 = Sex Chromosomes

  11. Human 46 Molecules that aid? G1? End of S? Enzymes 92

  12. G2 Growth/Prep for Mitosis “Centrioles” “Centrioles”

  13. MITOSIS Acronym? PMAT Phases? Prophase Metaphase Anaphase Telophase Cytokinesis

  14. 92 PMAT 46 46 Cytokinesis 46 46

  15. Chromosome  DNA pairs find “partner” = Sister Chromatids Sister Chromatids  “Homologous Chromosomes”

  16. M P Pairs? 46 T A  

  17. YouTube - Mitosis

  18. CYTOKINESIS Animal Plant “Cleavage Furrow” “Cell Plate”

  19. Daughter Cells go? Interphase

  20. 3 1 Prophase Anaphase 4 Telophase Which? 2 Metaphase 5 Interphase

  21. Control of the Cell Cycle 90% time in Interphase Feedback signals – “red/green light” Controlled by proteins

  22. Cancer = uncontrolled growth/division of cells If gene that contains info for cell growth/division is mutated = Cell growth/division unregulated

  23. Tumor • = a mass of abnormal cells. “benign tumor” “malignant tumor” • Metastasis • (start more tumors) Therapy? Radiation therapy Chemotherapy with toxic drugs. Mammograms 

  24. END

  25. How many cells are in a phase represents how long the phase is

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