Lect_26-1 - Lecture 26: Plant Biotechnology GM Crops...

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Unformatted text preview: Lecture 26: Plant Biotechnology GM Crops Debate: Pros and Cons What is biotechnology? Traditional plant breeding Recombinant DNA: genetic engineering How do you make a transgenic plant? Applications of plant biotechnology: some examples Advantages vs. risks Conclusions Last lecture We saw the problem of world hunger how human population is increasing geometrically, the amount of land remains the same One big challenge is to produce more food with the same amount of land. GM crops Debate Do the benefits outweigh the risks? Are GM crops capable of solving some world food problems? Are GM crops safe for the environment? Are some kind of genetically altered crops more justifiable than others? Should GM foods be labeled? Will human health problems or environmental problems arise from the production of GM crops? Biotechnology What is biotechnology? ______________________ is the use of living organisms to provide useful products for humanity Humans have been using biotechnology for thousands of years: for example, selecting wild edible plants and __________________ them (corn, tomato, etc.) Goals of biotechnology Biotechnology can also be defined as the use of scientific ______________ to create plants with new, useful characteristics Goals: 1. To identify a useful ____ or characteristic (___) 2. To incorporate it into a valuable crop plant Can achieve these goals in two ways, by: ___________________ plant breeding ___________________ engineering Traditional plant breeding The traditional method for improving plants is called _________________breeding: 1. Select desired characteristics of crops (high yield, insect resistance, etc.) 2. ___________________ mating the plants selectively to bring the genes together 3. Offspring is a hybrid with the combined, desired genes 4. Farmers save the seeds from the best plants to grow next year The Green Revolution _____________ Revolution : the introduction of scientifically developed food crops that can produce high yields...
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This note was uploaded on 01/28/2012 for the course BSCI 124 taught by Professor Moctezuma during the Fall '08 term at Maryland.

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Lect_26-1 - Lecture 26: Plant Biotechnology GM Crops...

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