dog qualities of many breed that have show lines, through rewarding of external appearance without requirements for work. In some breed clubs, such as the Jack Russell Terrier Club of America, working ability and health are valued over conformation to the breed standard. However, even in the JRTCA breed standard only externally observed aspects of the dog are described, as working tests and genetic tests are beyond the scope of a breed standard, which exists as a description of the dog, not its DNA. See also Breed standard (dogs) Conformation (dog) Championship (dog) Dog breeding Dog anatomy References Dog shows and showing Dog breeding