Again you are wrong. There are two..a Yellowstone herd and one on a reservation that are pure bison, with no cattle genetics . And in other wild herds, there isn't enough to influence anything, just enough to show up in a DNA test, Kinda like DNA of most humans will show traces of Neanderthal . It would be impossible to isolate and "breed up" either to get a pure Cattle or a Neanderthal. There were white buffalo for hundreds of years in North America before cattle were brought over, Albinism is present in all mammals...bison are no different.Not quite that simple. There are multiple different phenotypes of white coat color in cattle/buffalo. Very few of these are a simple dominant or simple recessive gene mutation.
Most are the result of a combination of genes that are responsible for the coat color. (No one single gene location is responsible for the white phenotype.)
And genetic studies have proven that all living North American Bison are the result of cross with domestic cattle.



