I know this thread is ANCIENT, but since it is something I was searching for, I'd like to throw in my $0.02, in case others come across this thread in a search.

The way I understand it is that heterozygous Phenotype naming works backwards from the recessive pairing, whereas heterozygous Phenotype naming works forwards for dominant/co-dom. You have Het Albino working towards Albino (homo), and you have, for example, Yellowbelly (het ivory) working towards Super Yellowbelly (Ivory homo).

I hope that's a correct understanding that's not confusing...