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.
Still, only some of the cells that make up the chimeric mouse carry the knockout mutation, and those cells are heterozygous for the mutation. In order to learn about the function of the target gene, a mouse that is homozygous for the knockout mutation must be studied.o produce a mouse that is homozygous for the target gene knockout, chimeric mice capable of passing the knockout mutation on to their offspring must be identified. Figure 6: Mating a chimeric (spotted) mouse with a normal (white) mouse can yield a knockout mouse, among other normal mice.