PEW genetics confusion

[Moon Breeze]

Hello!

I lost my only Schimmel gerbil back 2 years ago when he passed away from old age. His last litter was with a Slate female and produced two gerbils: a black male and a PEW female. I have since then paired the brother and sister only for founder line reasons to get back a Schimmel. The results have been confusing because from their two litters, I've only had black or light nutmegs produced.

I could use some help figuring out the genetics specifically regarding the PEW female.

Here is what I have so far:

Schimmel Dad: Aa Cc[h] DD e[f]e[f] pp UwUw - Light Ruby Eyed Schimmel
Slate Mom: aa Cc[h] DD Ee Pp uw[d]uw[d] - Slate

Black Male Offspring: aa C* DD Ee[f] Pp Uwuw[d]
PEW Female Offspring: a* c[h]c[h] DD ee[f] p* Uwuw[d] (I do not know if she is Pp or pp and Aa or aa)

Offspring of Offspring:

Black: aa Cc[h] DD E* P* Uw*
Light Nutmeg: aa Cc[h] ee[f] P* Uw*

Now based on what I know if PEW's genetics, the P locus must always be pp. However according to Moonstone Gerbils genetics calculator, PEW can be Pp. (See image below)




Based on the last two litters of the PEW and Black gerbils, their pup color percentages have been:

Light Nutmeg: 50%
Black: 50%

My questions are:

1. Is it possible that the PEW is aa for sure or can she still be an Aa?
2. Is is possible for a PEW to be Pp based on the genetics and info I've provided here?
3. What is the actual likelihood of producing any Schimmel gerbil from the PEW and Black gerbil pair?
4. Do you have any advice to breed for Schimmels with the gerbils I have?

Thanks for reading!

[Shooting Star]

That's an error. PEW is always pp.

How many pups have the Black x PEW had? Seems like you're just having bad luck. If they both have a Schimmel parent, then together they have a 25% chance of Schimmel-based pups.

With those parents, you should also be seeing Slate, Silver Nutmeg, and Silver Schimmel. So at this point I wouldn't assume the PEW is aa, since there's a lot of colors you *know* you can get that you just haven't yet.

[Moon Breeze]

Thanks for the reply Shooting Star!

I'll let Moonstone Gerbils know about the error. So I can definitely say pp then for the mother.

I checked my breeding records. The PEW female (Alva) and black male (Ragnar) have actually had 3 litters.

Litter 1: 1/9/2016 had 7 pups. Colors were black and light nutmeg
Litter 2: 2/20/2016 had 6 pups. Only one survived so I am unsure of the others, but the surviving pup is light nutmeg
Litter 3: 3/17/2016 had 4 pups. Two are black and one looks like light nutmeg, and the fourth is slightly lighter (barely)

I'll post pics as soon as my phone finishes charging!

[betty]

I had some PEW litters where the percentages were 'wrong' and I didn't get the colours that the parents had genes for, and this was due to the linking of the colourpoint gene to the pink eye gene. There were 13 colours they should have produced, but they only produced 3 colours in the end (out of 3 good-sized litters).

I haven't worked with Schimmel, but is there a similar linked gene issue with it?