Tan and White Explained
  Tan and White (ayBCDEgmrsi/spt) This color has the same formula as the Tan dog with the exception of carrying a different gene that produces varying amounts of white. If your dog is Tan and White the (S) gene would be replaced with one of these White producing gene patterns, (si, or sp) in any combination. For more info see White Chart.
This color is dominant in nature in double dose to the colors Black and Tan, and Sable but recessive to Black. In order to produce a true Tan dog it must be bred to a dog of the same color or a Sable dog which carries the (ay) gene. It appears as a  Tan color and can vary in shade from light to dark. It is uniform in color throughout the dogs coat and always has a black nose. This color is exactly the same in formula to a Red Tan dog but appears very Tan  in color as opposed to rich Reddish Tan. This is due to the modifying genes that a dog carries and is usually breed specific. 

                                                                       MATING RESULTS

Color Index