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Food for thought (and essay questions, yes plural)

Food for thought (and essay questions, yes plural). Essential Question: In terms of genetics, what does this cartoon mean?. Homework:. Scientists used a bioluminescent gene from a jellyfish to create “glowing” green mice! Cool huh?.

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Food for thought (and essay questions, yes plural)

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  1. Food for thought(and essay questions, yes plural) Essential Question: In terms of genetics, what does this cartoon mean? Homework:

  2. Scientists used a bioluminescent gene from a jellyfish to create “glowing” green mice! Cool huh? Check out this PowerPoint to see how they did this…. and more!

  3. Genetic Engineering and Selective Breeding Everything you need to know!

  4. KUDs • Know • Selective Breeding involves choosing two organisms of the same species and mating them with the hope of getting the bestqualities of each parent to show up in the offspring. • Genetic Engineering involves identifying certain genes and moving them from one organism to another – even to a different species or removing the gene entirely! • Both activities are controversial. • Do • Discuss the advantages and disadvantages of both processes. • Analyze scenarios and determine if the situation is an example of genetic engineering or selective breeding. • Understand • Genetic engineering is an ethical issue that needs to be regulated by the personal, cultural, and global conscience.

  5. Genetic Engineering: Details • It produces an organism that has a new traitit would most likely not have developed on its own • Taking DNA from one organism and inserting it into another organism’s DNA sequence to ensure the organism will have a specific trait

  6. Example #1: Genetic Engineering Reducing Disease • Genetic engineering can increase health.  For example, a diabetic's body lacks the important hormone insulin.  • Scientists first remove the gene that creates insulin from a healthy donor.  • The insulin gene can be created and replicated for a diabetic.  sleep infections

  7. Scientists engineered chickens to be featherless by REMOVING the gene in chicken DNA that causes them to grow feathers! Example #2: Genetic Engineering Featherless chickens

  8. Example #3: Genetic Engineering Freaky Science • Scientists genetically engineered a mouse to grow a human ear by inserting human genes into a mouse embyro’s DNA!

  9. Example #4: Genetic Engineering New Unusual Traits • Placing the “anti-freeze gene” from a fish in tomatoes so the tomatoes can still grow in cold weather.

  10. Remember! Genetic engineering involves the manipulation of genes! Gene: a segment of DNA

  11. Genetic Engineering of insect resistant corn #1 Identify desired gene #2 Use enzymes to cut desired gene loose #3 Remove undesired gene #4 Insert desired gene into corn

  12. Advantages of Genetic Engineering • Will get improved organisms • Can create organisms with traits not previously thought possible • Can remove “bad” genes • Reduces the chance of getting “undesirable” organisms

  13. Disadvantages of Genetic Engineering • Co$tly • Must be performed in a lab with special equipment • Ethical issues • Long term negative affects (super C apples, allergies) • Negative environmentalimpact (superweeds, superbacteria) • No going back!

  14. Genetic engineering has few limits - except our imagination, and our moral or ethical code.

  15. Selective Breeding: Details • Selective breeding involves mating organisms with different “desirable” traits to get offspring with the desirable traits of both parents • Selective breeding is used mostly for dogs, cats, other pets, cattle, and crops.

  16. Example #1: Selective Breeding More Meaty Pigs

  17. Example #2: Selective Breeding Heat resistant, beefy cattle

  18. Example #3: Selective Breeding Quality Crops

  19. Example #4: Selective Breeding Bigger, better varieties X = Farmers crossed small, very red tomatoes with large, green tomatoes hoping to get large, red tomatoes (not small green tomatoes!)

  20. Remember! • Selective breeding crosses (mates) organisms with desirable traits to produce offspring that have the traits from both parents!

  21. Advantages of Selective Breeding • Might get improved organisms • Don’t need any special tools or lab • Can be performed easily by farmers and breeders

  22. Disadvantages of Selective Breeding • Undesirable traits from both parents may appear in the offspring • Disease can accumulate in the population • Remember the deaf dalmatians, boxers with heart disease, labs with hip problems, etc.?

  23. Genetic Engineering Relatively new process performed within labs Manipulates or alters the genetic makeup of organisms Results in organisms with new traits Selective Breeding Process has been around for thousands of years Combines the best traits of two organisms Results in organisms that have the desirable traits of their parents REVIEW

  24. Next Steps • Watch Video: What’s the big deal about genetic engineering? • http://www.iptv.org/video/detail.cfm/3762/exm_20030905_ge_part1/format:wmv • Complete the GE and SB practice sheet – get answers checked by a teacher • Start written HW (redo PPT and complete review sheet) • Do study stack (sort in the back of the room)

  25. GE SB SB GE GE BOTH BOTH SB SB GE

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