I think incomplete dominant and co-dominant are very close to the same thing (some subtle difference that's pretty much lost on me).

I think what you are talking about is heterozygous and homozygous form. A Mojave is heterozygous for the Mojave gene and a yellow belly is heterozygous for the yellow belly gene with the super Mojave and Ivory being homozygous for the respective genes. The actual mutation type (recessive, co-dominant, completely dominant) doesn’t change depending on if you are looking at a heterozygous or a homozygous genotype of the mutation; the type is actually defined by the differences or similarities in the way those genotypes look relative to each other and normal.

Many believe spider to be completely dominant as defined by the homozygous form looking like the heterozygous form. Pinstripe may well be the same although neither have been publicly proven yet with a demonstrated homozygous animal.

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