ISB 202 10-21-08 - ISB 202 10-21-08 Biotech...

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ISB 202 10-21-08 Biotech Revolution-started with discovery of DNA-1953 o 1. Before that? Traditional plant and animal breeding, using Mendelian genetics Major limitations: o 1. Could only cross closely related species o 2. Genes often come in groups- so additional traits were passed along with the one desired o 1970s-“Biotechnology”-allowed the movement of a single gene for a specific trait Two ways of introducing genes into plants: o 1. Agrobacterium tumefaciens A. A. t. are naturally occurring bacteria in soils and can infect >1000 species of plants B. put the desired gene into A. t. bacterium using “cutting and splicing” technique C. A.t. then: -infects the crop plant – “smuggles in a gene that causes cell division to produce a tumor and A.t. bacteria live in the tumor This a.t. process was discovered/developed by a professor of Crop and Soil Sciences at MSU, Dr. Mike Thomashow. Dr. Jim Tiedje, professor of Crop and Soil Sciences and Microbiology at MSU. Developed a system for life detection
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ISB 202 10-21-08 - ISB 202 10-21-08 Biotech...

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