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Published byPamela Wells Modified over 5 years ago
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STARTER In the movie “The Hunger Games,” the Capitol (a term used to refer to what we would call the government) produced genetically enhanced birds called jabberjays to spy on rebels. Unexpectedly, these birds bred with mockingbirds, creating a new hybrid bird called the mockingjay. The Capitol did not intend for this to happen, and the bird became a symbol of rebellion. What lessons can we draw about genetic engineering from these examples? Could a scenario like this, where a genetically engineered organism hybridizes with a wild animal or plant, happen in the real world? Why or why not?
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How many people thought this could happen? How many did not?
What conditions would be required for a genetically engineered organism to hybridize with a wild animal or plant? What steps could be put in place to keep this from happening?
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I. Humans use selective breeding to pass on desired traits to the next generations of organisms.
Hybridization: breeding technique that involves crossing dissimilar organisms to bring together the best of both traits. Ex. Mocking Jay, Grafting Plants etc. Inbreeding: continued breeding of organisms with similar traits. Ex. purebred animals
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The ultimate source of genetic variability is from mutations
Genetic engineering: process of making changes in the DNA code of an organism
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Different techniques are used to
A. Extract DNA from cells B. Cut DNA into smaller pieces 1. Restriction enzymes cut DNA at specific nucleotide sequences. 2. Ex. EcoRI cuts CTTAAG between the A and G
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C. Separate the DNA 1. Gel electrophoresis separates cut DNA fragments by pulling the negatively charged DNA fragments to the opposite end of a gel (smaller fragments move faster). 2. Gels are used to compare genomes from different organisms or to locate specific genes Amplify the DNA via Polymerase Chain Reaction (PCR
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-Transformation: a cell takes in DNA from an outside cell which
becomes part of the cell’s own DNA Recombinant DNA: combined DNA from two different sources/species Transgenic: organisms that contains another species DNA, contains recombinant DNA
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Fictional Transgenic Organisms
Tracker Jackers thehungergames.wikia.com
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Muttations
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Real Life Transgenic Organisms
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So what is all this about GMOs?
Genetically Modified Organisms General Term for any organism that has DNA changed from natural state using genetic engineering techniques - includes transgenic organisms - does not include hybrids -include micro-organisms such as bacteria and yeast, insects, plants, fish, and mammals
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It’s your turn!! Use your laptops to go online to “this link:
Click on the Transgenic Mutations on the right Modify your tomato If time, do the selective breeding with the corn and see the difference
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Homework http://www.pbs.org/wgbh/harvest/exist/
Read the introduction then vote at the bottom. Then click on the link at the bottom which says: Note: View all 12 arguments for and against GM foods at once or readers' opinions on the subject. Then read only the arguments that pertain to you depending on how you voted the first time and continue to vote. Keep going, reading the rest of the arguments ( only the ones you need to). DO NOT READ THEM ALL! Write a 1pg ( 12 pt font, double spaced) editorial newspaper article telling people about GMOs and persuade them whether or not they are a good thing (use at least 3 pieces of evidence!! MLA citation format)
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