NUSC 1645 Lecture 7: Genetically Modified Food
9 Apr 2018
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Desired gene -> transferred the desire gene to insert to specific object -> object expresses phenotype. Normal polygalacturonase gene: inserts to tomatoes -> tomatoes rots early. Altered polygalacturonase gene: polygalacturonase gene turned off -> transgenic tomatoes last longer. Involves the insertion of dna from one organism into another or modification of an organism"s dna in order to achieve a desired trait. Arctic fish dna + strawberry = a strawberry resistant to frost. Bacteria will help the plant to be resistant to herbicide (farmers can use herbicide and it will not damage the soybeans) Genetically enhanced soybeans express an additional enzyme that can tolerate this herbicides. Bt corn produces a protein that kills insect pests. Genetically engineered salmon : one salmon (promoter gene - gasoline), chinook salmon (growth hormone gene - fire) : introduce hormone and promoter together into the cells (eggs) -> salmon become huge : grows 2 times faster than ordinary salmon.
