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Sexual vs. Asexual Reproduction Credits to: Brianna Shields October 19, 2004 DO NOW- Hwk on desk! 1. Which cell part is green, found only in plants and is the site of photosynthesis? 2. Which cell part acts as the cleanup crew, recycling old cell parts? 3. Which cell part is found in both animal and plant cells and produces the energy for the cell? Homework Please clear everything except your homework off of your desk We will go over it together It is your responsibility to make the corrections GOAL To compare forms of sexual and asexual reproduction To understand the process of mitosis Sexual Reproduction Sexual 1. 2 parents Reproduction 2. Sex cells: sperm and egg 3. Sperm and egg join= fertilization 4. Offspring look different from parent (mixed DNA) Sexual Reproduction Sexual 5. Examples Reproduction – Humans, some plants, mammals, fish, reptiles, etc. Sexual Reproduction Asexual Reproduction Asexual 1. One parent Reproduction 2. No sex cells 3. Offspring produced by cell division 4. Offspring identical to parent (same DNA) 5. Several types in plants and animals 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 Types of Asexual Reproduction Budding 1. Small bud grows out of parent cell 2. Two different sized cells made (with identical DNA) 3. Bud breaks off and grows 4. In yeast and hydra Types of Asexual Reproduction Regeneration 1. Repair/ grow lost body parts 2. Left over cells divide to make more cells 3. Lobsters, starfish, lizards What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… What type of reproduction is this??? Explain… Asexual vs. Sexual Mitosis Mitosis 1. Cell division 2. Causes multicellular organisms to grow (even in humans) 3. Cells are identical to parent cells (same DNA) Mitosis Phase 1Interphase – Chromosomes copied – Cell resting – Threadlike chromatin (DNA ball) Mitosis Phase 2- Prophase – Mitosis begins – Chromosomes are rodlike pairs – Centrioles move to poles – Spindle fibers connect centrioles Mitosis Phase 3Metaphase – Chromosomes attach to spindle fibers – They line up in middle of cell Mitosis Phase 4Anaphase – Sister chromatids pull apart – One sister of each pair goes to opposite ends of the cell Mitosis Phase 5Telophase – 2 new nuclei form – Chromosomes are in a ball again (chromatin) Mitosis Phase 6Cytokinesis – Cytoplasm pinches in to form 2 new identical daughter cells Which phase of mitosis is this? Explain….. Which phase of mitosis is this? Explain….. Which phase of mitosis is this? Explain….. Which phase of mitosis is this? Explain….. Which phase of mitosis is this? Explain….. Which phase of mitosis is this? Explain…..