OBJ: Given lab SWBAT compare the main characteristics of mitosis to meiosis with 70% accuracy. BRING IN TEXT BOOK DN: Hand-in Constructed Response Packets #1 & 2; Mitosis vs. Meiosis Video ACT: Review Lab Procedures (color pencils); Work on Mitosis & Meiosis Lab HW: Complete Mitosis & Meiosis Lab (lab quiz tomorrow); Work on Genetics Review Sheets; Genetics Exam, this Monday April 28 TUE HW: Complete SVQ4 Quiz (reproductive systemweathering) Lab Notes Offspring contains trillions of human body cells Each human body cell = 46 chromosomes Human sex cell (gametes) = 23 chromosomes Human male sex cell = sperm (23) Human female sex cell = egg (23) _____________________________________ Mitosis (cell division, asexual): 46 → 46+46 My toes (Mitosis) are identical !! _____________________________________ Me sis (sexual): Sperm 23+23 → 46+46+46+46 Egg Zygote Polar Bodies Sperm and egg = Me i o sis Lab Notes: Page 1 Bottom Chart Mitosis Body cell Meiosis Sex cell 4 4 4 0 4 4 2 0 Lab Notes 1. mitosis: 2 daughter cells; meiosis: 4 daughter cells 2. Sex cells (gametes) 3. Sex cells combine to produce a fertilized egg (body cell; zygote); no fertilization 4. Rabbit sex cell= 22 chromosomes 5. So that when fertilization occurs, a 46 chromosome zygote forms; if a one chromosome sex cell does not occur, fertilization does not take place or a dead fetus/embryo occurs (miscarriage).