Well I think you need to get some terminology right first. Dominant and codominant refer to TYPES of mutations. Some people believe that hypomelanism is dominant meaning that there is no visual distinction between the homozygous (super hypos) and heterozygous (regular hypos). A codominant trait is one where there is an intermediate visual form so you can clearly tell a difference from heterozygous individual to homozygous individual like with motleys or jungles. Some people believe hypomelanism is codominant, it just depends who you talk to. Now I know what you meant in your question because people mislabel heterozygous hypos as codominant hypos and super hypos as dominant hypos, but that is not correct. I went through this kind of fast so if you have any questions please post back. Dave Colling is really good at explaining all this out easily so perhaps he'll post here too.

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