Ok, let me start off by saying that if it is a ghost, it shouldn't be "het" for hypo, it has to be homozygous for hypo, or else it really isn't a ghost. So, I would say that what you are seeing is either a misprint, or the breeder is saying the that animal is homo for one type of hypo and 66% het for another type, but I'm not certain what good such inforamtion would be in the case of the latter . . .???
As to the 66% business, here's where that comes from. When you breed two animals het for a common gene together, you expect to get 25% normals, 50% hets, and 25% mutants in a statistically average clutch. Now, the mutants are easy to pick out, but the hets look exactly like the normals. However, because they do have the possibility of having the het genes, each one of them is really more valuable than a normal. Therefore, the standard is that they are listed as 66% possible hets (because two-thirds of the normals are statistically het for the mutant gene in question).
That designation shows you that there is a mutation floating around in the mix, but it also shows you that the animal came from a het to het breeding, and there is no guarantee that YOUR animal will be het for anything at all. Each individual normal has a 66% chance of being a het. In reality, all of the normals could be hets, or none of them could be. You just have to understand that you are taking somewhat of a gamble and judge whether the price is right or not.
Hope that helps!
