2. Mitosis Introduction & (A)sexual reproduction review. January 23, 2013

3. DO NOW! 1. Which cell organelle contains all of eukaryotic cells’ DNA? 2. How many parent organisms are involved in ASEXUAL reproduction? 3. Which involves the mixing of DNA: sexual reproduction or asexual reproduction?

4. Homework Make Flash cards for each vocabulary word that we go over today. Use actual index cards OR… Use a piece of paper cut up into index card sizes.

5. Objective To compare forms of sexual and asexual reproduction To understand the process of mitosis

6. Sexual Reproduction 1. 2 parents 2. Sex cells: sperm and egg 3. Sperm and egg join= fertilization 4. Offspring look different from parent (mixed DNA)

7. Sexual Reproduction 5. Examples –Humans, some plants, mammals, fish, reptiles, etc.

8. Sexual Reproduction

9. Asexual Reproduction 1. One parent 2. No sex cells 3. Offspring produced by cell division 4. Offspring identical to parent (same DNA) 5. Several types in plants and animals

10. Types of Asexual Reproduction Binary Fission 1. Organism divides in half 2. 2 identical daughter cells produced 3. Daughter cells are half the parent’s size 4. Daughter cells grow, then divide too 5. In bacteria

11. Types of Asexual Reproduction Budding 1. Small bud grows out of parent organism 2. Two different sized cells made (with identical DNA) 3. Bud breaks off and grows 4. In yeast and hydra

12. Types of Asexual Reproduction Regeneration 1. Repair/ grow lost body parts 2. Left over cells divide to make more cells 3. Lobsters, starfish, lizards

13. What type of reproduction is this??? Explain…

26. Asexual vs. Sexual

27. Mitosis 1. Cell division 2. Causes multicellular organisms to grow (even in humans) 3. Cells are identical to parent cells (same DNA)

28. Mitosis Phase 1- Interphase –Chromosomes copied –Cell growing & resting –DNA is in the form of Threadlike chromatin (messy DNA ball)

29. Mitosis Phase 2- Prophase –Mitosis begins –Chromosomes are rodlike pairs –Centrioles move to poles –Spindle fibers connect centrioles

30. Mitosis Phase 3- Metaphase –Chromosomes attach to spindle fibers –They line up in middle of cell

31. Mitosis Phase 4- Anaphase –Sister chromatids pull apart –One sister of each pair goes to opposite ends of the cell

32. Mitosis Phase 5- Telophase –2 new nuclei form –Chromosomes are in a ball again (chromatin)

33. Mitosis Phase 6- Cytokinesis –Cytoplasm pinches in to form 2 new identical daughter cells

34. Which phase of mitosis is this? Explain…..