The dog, the first animal domesticated by man and his companion for at least 15,000 years. The dog is a close relative of the gray wolf, Canis lupus. They both have a chromosome number of 39, and species hybrids are fertile. At least 400 different genetic diseases have been identified in dogs, and most of these are homologous to the human conditions (Duchenne and Becker types of muscular dystrophy, Niemann-Pick disease, von Willebrand disease, hemophilia A and B, and testicular feminization are examples). The dog genome contains 2.4 Gbp of DNA. See Classification, Mammalia, Eutheria, Carnivora; dog breeds, wolf.
Subjects: Genetics and Genomics.