This one is a tuffy. I have a black hooded female that I bred to my "siamese" male. I put it in quotations because we aren't sure if he's true siamese or himalayan, I'll explain later.

Anyways, the litter was this:
2 Black berkshire
3 Black hooded, even though they weren't perfect lines and a little broken
9 whitish/ creamish babies with red eyes.

I am completely positive that all the white babies were siamese/ himalayan, since they weren't a nice white color I expect albinos to be, and anyways, to be a true albino the mother would have to be a carrier correct, which isnt too hard to fathom.

This is further validated by the fact that the one female in particular from this litter has a few really light tan marks on her back, which the albino gene is supposed to completely dilute, whereas the c[h] gene only affects it to a lesser degree. And it is common for some siamese to have this spotting/banding.

And from certain angles it even looks like she has a white hood! It's really tough to explain, because it could just be a reflection from her longer guard hairs or something. Both my boyfriend and I have noticed from time to time. When your looking for it, it gets harder to see I guess.

Anyways, I'm trying to get some genetic background on my 2 breeders from this litter, and I'm stumped on whether or not my boy is a siamese or a himalayan. It seems more plausible that he is himalayan, because I can't see these 2 rats from different backgrounds to both carry the c[h] gene. I would expect albino to be more common than c[h].

Even more boggling is that the female has to be also Rr
and he is either hooded, or carries it, for the hooded blacks.

Help me figure out this mess!