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LO: SWBAT explain the difference between asexual and sexual reproduction and describe different types of asexual reproduction DN: Explain the differences between sexual and sexual reproduction HW: Vocabulary: chromosomes, asexual reproduction, sexual reproduction, binary fission, regeneration, budding, sporulation, vegetative propagation Who thinks they can define Reproduction? The process by which living things produce other living things like themselves. The production of offspring. What are Chromosomes? Found in Nucleus XX XX • found in the nucleus •determine our physical characteristics •Made of DNA •Instructions of cell •Passed on to offspring cell Types of Reproduction: Asexual Reproduction XX XX Parent XX XX XX XX Clones Offspring Clones Genetic Information (Chromosomes) 1) the creation of a new individual from only 1 parent. 2)Genetic information of offspring is identical to the parent. Do the cells in our body undergo asexual reproduction? Yes- mitosis When do the cells of our body undergo Asexual Reproduction? Growth Repair 1. BINARY FISSION The splitting of a one-celled organism into 2 equal halves. Example: Bacteria & Ameba 2. Regeneration The ability of organisms to grow back limbs if they are cut off. • If cut into 2 pieces each piece will be a new offspring. • Will they be identical? 3. Budding: • a new cell is formed from a tiny bud on the parent cell • Parent large and offspring small • Example: hydra & yeast Sporulation • Each spore (plant offspring) is a clone • mold Vegetative Propagation When roots, stems and leaves give rise to a new plant Types of Vegetative Propagation: Natural: 1)Runners 2)Bulbs 3)Tubers 4)Rhizomes Artificial: 1)Cuttings 2)Grafting Runners Offspring grow from one parent plant Are they identical to parent plant? Bulbs Underground stem with fleshy leaves which store food Tuber Underground stem enlarged for storage of food Rhizomes •Stems that grow sideways underground. •New plants can grow from these stems. Cuttings Vegetative part of a plant is cut, and it can develop into a new plant. Root Growth Grafting A cutting from one plant (scion) is attached to the main body of a rooted plant (stock). What is Sexual Reproduction? the joining of two cells to begin the development of a new individual. These called: special cells are Sex Cells (Gametes) Sexual Reproduction XX + XX XX XX Offspring Egg A fertilized egg cell is called Sperm a Zygote 1) Is the creation of a new individual from 2 parents. 2) Offspring are not genetically identical to the parents. What are the names of these sex cells? Egg cell (Female) Sperm Cell (Male) The joining of a sperm cell with an egg cell is called fertilization. We get half our genetic information from mom and half our genetic information from dad 23 23 Males: Sperm cells Females: Egg cells Asexual vs. Sexual Reproduction 1 Parent Offspring are identical Produce 2 Parents Offspring Offspring are Critical for not identical survival of the species Bacteria, Ameba, Humans, Body Cells Dogs, Plants Asexual Reproduction Sexual Reproduction