quote:
Genetic Evidence for an East Asian Origin of Domestic DogsPeter Savolainen, Ya-ping Zhang, Jing Luo, Joakim Lundeberg, and Thomas Leitner
Science Nov 22 2002: 1610-1613.
Ancient DNA Evidence for Old World Origin of New World Dogs
Jennifer A. Leonard, Robert K. Wayne, Jane Wheeler, Raúl Valadez, Sonia Guillén, and Carles Vilà
Science Nov 22 2002: 1613-1616.
So now you can go to the local University library and look it up. Tell me if they talk of the DRD4 or D4 gene.