Pinstripe appears to be dominant other than that normal is basically the dominant expression of the various genes. Keep in mind that many morphs are not mutually exclusive. For instance a snake can be both axanthic and albino at the same time. What you see is not one Phenotype called Snow its two phenotypes albino and axanthic that are both visible at the same time.
It can get very complicated though. Look at the Labrador retriever for instance. Yellow is a recessive trait that covers up both Chocolate and Black when expressed. Black is dominant and Chocolate is recessive. This means that unless you know the underlying genetics you can get a lot of variety out of a single litter. Genetics can get very complicated and it sometimes takes years and years before the interactions of genes is understood if ever. Blood type is another interesting complicated genetic trait that turns out has many subtleties beyond just A/B, +/-.