I have a color genetics question:
So I hatched on OE from my blue copper Marans over my white EE.(hatchery bird that said it was a white AM)
The chick hatched all yellow except for 3 tiny black dots on it's body.
It's feathered to be beautiful almost all white with maybe 2 light grey feathers on the body and a black dot on the head.
I wouldn't call it splash only because it hatched out yellow and not the light grey.
Long story short:
But I can't find on color genetics what a blue and white cross will produce for color feathering. Wondering what this is AND what would this pullet give if crossed back to a blue Marans. I think it's a pullet . 4-5 weeks
More than likely your white Ameraucana was dominant white over black or silver. When you cross a double dominant white bird over black you will get white offspring with occasional black feathering. Because you crossed Blue(single diluting gene) over the white bird, I would put money on your white bird with occasional grey feathers to be carrying diluting gene under a single dominant white gene - not splash.
I would put money on a second cross back to a black bird to produce 25% White with occasional black feather, 25% that look like your current pullet, 25% black 25% blue off spring carrying no dominant white genes.