Despite the name, the primary modern flavoring ingredients in a cola drink are sugar, citrus oils (from oranges, limes, or lemon fruit peel), cinnamon, vanilla, and an acidic flavorant. Manufacturers of cola drinks add trace ingredients to create distinctively different tastes for each brand.
Features of inbred mice. A strength of the laboratory mouse as a model system results from the availability of hundreds of inbred strains which harbor different characteristics, including some that are prone to develop specific types of cancers.
A knockout mouse or knock-out mouse is a genetically modified mouse (Mus musculus) which researchers have inactivated, or knocked out, an existing gene by replacing it or disrupting it with an artificial piece of DNA.hile knockout mouse technology represents a valuable research tool, some important limitations exist. About 15 percent of gene knockouts are developmentally lethal, which means that the genetically altered embryos cannot grow into adult mice.