Everywhere you need to be. FedEx Home DeliveryÂ®. When shipping your package to a customerâs home, you want it at their door at the time that works best for them. With day-definite, evening and appointment delivery times you can tailor delivery to when it is convenient for your recipient.
Biochemistry of Dog Coat Color. The color of a dogâs coat is determined by relative levels of two pigments: eumelanin, which can be either brown or black, and pheomelanin, which is yellow to orange or red. Both pigments are generated by metabolism of tyrosine. A schematic diagram of the pathway is below. Schematic of the melanin synthesis pathways.
Labrador retrievers and epistasis. - In Labrador retrievers (commonly called Labs), black coat color is dominant to brown. Let's designate B and b as the two alleles for this character. For a Lab to have brown fur, its genotype must be bb; these dogs are called chocolate Labs.