The C locus is a specific location on a chromosome that plays a crucial role in determining the color of an organism's coat or fur. It is particularly significant in animals like cats and dogs, where variations in the C locus can lead to different color patterns, such as solid, spotted, or striped. In genetics, the C locus is associated with the production of the pigment melanin. Different alleles at this locus can result in varying levels of melanin, influencing the overall appearance of the animal. Understanding the C locus helps breeders and geneticists predict and select for desired traits in various species.