What traits are dominant for dogs? For instance, brown hair and brown eyes are dominant for humans. Is dark hair/coat also dominant for dogs?
If so, I suppose your dog could have recessive traits being expressed.
Sorry, that's the extent of my knowledge...
My understanding from long ago biology classes was that it wasn't actually as simple as dominant brown/recessive blue. There are apparently dilution genes that can turn a brown eye hazel, for instance. Green can be a variant of brown or blue as well I believe, but don't quote me on that!
White coat is a recessive gene kind of how you can get a white boxer from two parents who are not white. Both parents need to carry that gene, though, for one of the puppies to come out white.
Here's where my skepticism comes in even with my rudimentary genetics understanding:
Option AParent #1 is half chow/half giant schnauzer
Parent #2 is multi-breed mutt
Parent #2 could certainly carry recessive white coat genes and eye genes that would dilute brown to green or gold (like one of her eyes).
Parent #1 could not have these recessive genes, though, b/c I don't believe that either chows or schnauzers carry recessive eye or coat coloration genes that would result in a white puppy with bicolored eyes.
Option BParent #1 is half chow/half multi-breed mutt
Parent #2 is half giant schnauzer/half multi-breed mutt
Both of the parents would need part of their multi-breed mutt to be made up of siberian husky, aussie, or some other dog with the bi-colored eyes and both would need have mutts with recessive white coated genes. The chance that this happened
and they both passed those recessive genes only on to Bianca seems kind of slim to me.
Both parents' pure bred halfs also must have mated with some really small dogs to get a dog her size. This seems like a lot of happenstance to me.