[souffle]

Practically though it is hard because a marbled hamster can look very like a hamster half in winter coat and you get various versions of good and bad marbled agouti and pearl animals.
Genetics may say you get certain numbers statistically but it seldom works that way.
A pearl with both patterns may have just 3 hairs for example showing as the marbled gene so how likely are you to spot that?
In theory it may be easy but in practice it would not be easy!
I don't breed Winter Whites but the person I asked is a breeder and a judge as well as a geneticist.
If you were going to show the hamsters you would not want to mix the patterns anyway so it is probably not really something a breeder would do intentionally therefore there will not be many mixed patterns around in the pure winter white lines.