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.
These genes are names for their recessive mutant phenotypes, so mice homozygous mutant at the albino locus have no pigmentation (white fur and pink eyes) and heterozygotes and wild type for albino have pigmentation (dark fur and eyes). The albino gene product, tyrosinase, is necessary for the synthesis of all pigment. Mice have two different pigments in each hair, yellow at the tip and black in the rest of the hair. In albino mutants, neither pigment is made. The nonagouti gene product is necessary for the production of the yellow pigment, so mutant nonagouti mice have black hair.