Re: Color genetics
That sounds right to me.
If even one of her parents was homozygous Sable, all the pups would be sable. So if there was a black and tan pup, at least one parent must be carrying black and tan, but you are right. The other parent could be carrying bi color or black. A pup that had the genotype black and tan/black would show as the phenotype black and tan. So yes, you've pretty well mapped out the possibilities for her color inheritance.
And I believe the color inheritance/dominance is sable, black and tan, bi color, and then black.
Bianka vom Eisernen Loewen IPO3, CGC, TC 1-3-08
Cade vom Eisernen Loewen IPO1, CGC 3-25-09
D'Artagnan (Tag) vom Eisernen Loewen BH 2-2-10
G Aiko von Burkndeiros SchH 3, IPO3, FH, TC, KKL2 9-17-02 (Retired)
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