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79. DNA Notebook Check 80. Genetics Unit Cover – title & 5 colorful pictures 81. Reproduction PowerPoint Presentation
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79. DNA Notebook Check 80. Genetics Unit Cover – title & 5 colorful pictures 81. Reproduction

79. DNA Notebook Check 80. Genetics Unit Cover – title & 5 colorful pictures 81. Reproduction

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79. DNA Notebook Check 80. Genetics Unit Cover – title & 5 colorful pictures 81. Reproduction

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  1. 79. DNA Notebook Check • 80. Genetics Unit Cover – title & 5 colorful pictures • 81. Reproduction • 82. The Order of Mitosis • 83. Mitosis Lab • 84. Meiosis Notes • 85. Comparing Meiosis vs. Mitosis • 86. Cell Reproduction Review • 87. Regulating the Cell Cycle • 88. Why Variation Occurs • 89. Cell Reproduction Crossword • 90. Progress Report #5 • 91. Cell Reproduction Notebook Check

  2. IMPORTANT DATES!!! • Next class - Cell Reproduction Quiz • 2/27 thru 3/7 - Castle Learning Extra Credit • 3/1 & 3/2 – • Progress Reports due back signed, • Notebook check signatures (#79) • Notebook Checks for 79 – 91 • CMS assessment • 3/3 & 3/4 – Chapter 11 Reading Guide due • 3/8 TUESDAY 8 am - DNA OR Cell Reproduction Quiz retakes • 3/11 - Honors Assignment Due • 3/16 & 17 - Vocabulary Quiz 7a (sept – toxico)

  3. #81 Reproduction ASEXUAL SEXUAL

  4. ASEXUAL REPRODUCTION • Requires only one parent/cell • Offspring genetically identical to parent cell • Types: • Fission/Budding • Fragmentation • Regeneration • Advantages: inability to move/mate, high production/low cost, very little change occurs DEFINE THESE!

  5. CELL division a form of asexual reproduction • Why do we need our somatic cells to reproduce? • Organisms grow because they have MORE cells • Tissue Repair • Parent cell turns into 2 daughter cells • DNA replicates and is evenly distributed to new cells • THE CELL CYCLE • Interphase: preparing for mitosis • cell growth and DNA and organelle replication occur • Mitosis: NUCLEAR DIVISION, 4 stages: • prophase, metaphase, anaphase, telophase • Cytokinesis: DIVISION OF CYTOPLASM • I put macaroni above the counter video

  6. SEXUAL REPRODUCTION • Requires two parents/cells • Offspring has a mix of genes • GAMETES= sex cells (sperm, egg) • Contain only 23 chromosomes (SOMATICcells contain 46 chromosomes) • Sperm + Egg = ZYGOTE • (all living things start out as one cell) • FERTILIZATION= when sperm & egg meet • MEIOSIS – how your body makes sperm cells and eggs cells

  7. THE ORDER OF MITOSIS • DNA replicates • Cell grows • Cell duplicates its organelles

  8. METAPHASE

  9. ANAPHASE

  10. PROPHASE

  11. CYTOKINESIS

  12. INTERPHASE

  13. TELOPHASE

  14. CYTOKINESIS • In plants • In animals

  15. MEIOSIS #84 • Process of making sex cells (gametes) • Involves TWO cell divisions (meiosis I & II) • Reduces the # of chromosomes in a cell • Makes HAPLOID cells(containing 23 chromosomes) = n • Somatic Cells = DIPLOID = containing 46 chromosomes = 2n • Each chromosome has a “partner” called a homologous chromosome (23 pairs) • These homologs contain the same “type” of information, but not identical

  16. Homologous Pairs Homologous pairs have regions that code for the same genes (hair color) Mom donates B for brown hair Dad donates b for blonde hair Sister chromatids are exact replicas to each other

  17. Spermatogenesis – creation of sperm cells through meiosis • Occurs in testes • Creates 4 sperm cells • Begins at puberty, ends at death • Takes 7 weeks to complete • Oogenesis – creation of egg cells through meiosis • Occurs in ovaries • Creates 1 egg cell (matures monthly) and 3 leftover cells • Begins before birth, ends menopause

  18. video

  19. Regulating the Cell Cycle #87 • Cells at the edges of injuries… • When the healing process nears completion, those rapidly dividing cells… • Cyclins are a group of proteins that… • Internal regulators are… • External regulators are… • Cell growth is regulated so carefully because… • Cancer is… • Cancer cells [do/do not] respond to the signals that regulate the cell growth. • Create a 3-step flowchart about how cancer forms. • Why can cancer be considered a disease of the cell cycle? Pg. 250 in text

  20. Regulating the Cell Cycle #87 • Cells at the edges of injuries… • When the healing process nears completion, those rapidly dividing cells… • Cyclins are a group of proteins that… • Internal regulators are… • External regulators are… • Cell growth is regulated so carefully because… • Cancer is… • Cancer cells [do/do not] respond to the signals that regulate the cell growth. • Create a 3-step flowchart about how cancer forms. • Why can cancer be considered a disease of the cell cycle? Pg. 250 in text

  21. Cancer forms when…

  22. Why Variation Occurs #88 • Crossing Overduring meiosis I • homologs swap genetic material video

  23. Random assortment of chromosomes during meiosis • Gametes get different alleles of genes • Gene Mutations • Fertilization (certain sperm + certain egg) • Non-Disjunction…

  24. Non-Disjunction… • chromosomes don’t separate properly during meiosis (anaphase I) • Trisomy= 3 chromosomes in pair