ChristopherD said:
if the Ultra gene is co-dominant is it possible to have hets or is it a homoz feature ,what im thinking may be wrong ,does it take one(showing) to make one
Codominant is a relationship between two alleles at the same locus, so nothing is codominant in a vacuum, it is codominant TO something else.
Same applies to recessive and dominant. It is a relationship between two alleles at the same locus. One gene cannot be recessive or dominant by itself, they have to be recessive TO or dominant TO an allele.
Ultra is codominant to amel. (Amel is codominant to ultra. Same thing)
Ultra is recessive to its wild-type allele. (a<sup>u</sup> is recessive to A<sup>+</sup>)
Amel is recessive to its wild type allele. (a<sup>a</sup> is recessive to A<sup>+</sup>)
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Also, ultra is neither codominant, dominant, or recessive to lavender.

(I know that's not what you meant Joe but that's how it will be read by a lot of people, LOL.)