Quote Originally Posted by bigballs
so the genotype and phenotype of a pastel is codominant, then that of a super pastel is dominant?
Two different ideas here, but also, very close.

Since the super pastel has two copies of the pastel gene, each animal that it sires will receive one copy of the pastel gene from them, making them pastels.

The pastel gene is still incomplete dominant, whether the animal has one or two copies of the gene. That is just the way the gene works. The pastel, which only carries one copy of the gene, is only showing a partial expression of the pastel gene. The pastel has only one pastel gene to pass along, so some of the babies get the normal gene, and some get the pastel gene.

When that pastel has both copies, they show the full expression of the gene, the Super pastel. It is still an incomplete dominant, but the super has 2 pastel genes to pass along instead of just one.

I think your getting methods of inheritance crossed with the way the genes work by themselves.