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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 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

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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

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