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Ms. Hu Living Environment Name: _______________ Class: ______ Date: ____________ Pg#_____ Aim: Cloning is a type of Asexual Reproduction. How are scientists able to create clones of organisms in the laboratory? Do Now: Define the following terms: Budding Binary Fission Spores When you think of Cloning what you do think about? Did you ever hear anything in the news regarding cloning? Mini Lesson Notes: Definition of Cloning: Example 1: Prize Winning Beefsteak Tomato Plant. You won a vegetable growing contest where you grew the largest beefsteak tomato! You want to make sure that next year you grow a prize winning tomato? How would you do that? Procedure to clone a Tomato Plant: a. Cut a part of the plant, such as a stem, from a plant and plant it. It will develop roots and leaves,; this new plant will be genetically identical to the parent plant b. Take out a cell from a mature plant. From the cell with a special mixture of growth hormones. The cell will develop into a plant that will be genetically the same as the parent Example 2: Dolly the Sheep http://www.encyclomedia.com/video-dolly_the_sheep.html Scientists are able to make clones of mammals like a sheep using a special laboratory technique. 1. Remove the nucleus of a donor egg from a black-faced sheep to create an egg cell with NO DNA in it. 2. Suck out the DNA from a white-faced sheep 3. Using an electrical current ZAP, the empty egg and the DNA from the white faced sheep 4. Empty egg and DNA will fuse together to create a zygote 5. Embryo is implanted into another female sheep 6. The lamb will have the exact DNA as the white-faced donor DNA sheep Work Period: In groups of four, create a diagram showing how to create the following types of clones. Group A: Your beloved Cat Oscar is very old. You want to make a clone of him. How would you do it? Group B: You are a competitive gardener; you grow a lovely black rose. How would you clone the rose plant? Group C: You have selectively bred a prize winner fish named ‘Carpy’. How would you make more clones? Group D: You have a rare African clawed frog. For more zoos to enjoy the frog, how would you clone it? Extension Questions: 1. Would a clone be exactly genetically identical to the donor’s DNA? Why or why not? 2. Gene expression is influenced from environmental factors. If Carpy grew up fed with a different food would he have the same physical traits as the original Carpy? 3. Do you think that a genetically cloned cat would have the same personality as the orginal pet? Closing: What is a clone? How are scientists able to use this technology to benefit society? Homework: Try question on Cloning: # 6. 7. 8. On the homework Sheet