[quote=@TheUnknowable]
not all of your mother's or father's will necessarily be on the same chromosome, in the same location on the chromosome, or compete with each other.  Technically, I suppose each super gene would be either a dominant or recessive form of the gene, with each super gene being a different gene.  Making a system like that for an RP would be a bit too complex, though.
[/quote]

For example, eye color is determined by a single set of genes, but the gene has three variations: brown, blue, and green (blue is recessive, green is recessive to both). 

In contrast, hair color is determined by I think at least five separate sets of genes.