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.
Using knock-in genetic engineering, Jacobs et al. have effectively created a mouse with a retina like that of a New World monkey, with one very important difference: mice do not have well-developed form vision, and do not have midget cells. Mice do not already have the hardware that many assume is a critical first step to the evolution of color vision. Despite this, three of the five transgenic heterozygote female mice tested by the authors could discriminate reds from greens, showing color matches remarkably similar to humans .