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Genetic engineering is used to create animal models of human diseases. Genetically modified mice are the most common genetically engineered animal model. They have been used to study and model cancer (the oncomouse), obesity, heart disease, diabetes, arthritis, substance abuse, anxiety, aging and Parkinson disease.
A new technique in genetic engineering is creating quite a buzz in the genetics world because it allows researchers to do just that: edit the DNA of living cells. ADVERTISEMENT. ADVERTISEMENT. It is called CRISPR and it uses an enzyme discovered in bacteria that can target a specific sequence of DNA and cut it. Bacteria use this enzyme as a kind of immune system targeting, cutting and disabling the DNA of viruses attempting to infect the cell.