What phenotype and genotype offspring is expected from crossing heterozygous gray mice?

What phenotype and genotype offspring is expected from crossing heterozygous gray mice? It is known that gray dominates over black.

We mark the predominant gray as S, and the suppressed black as s. Parents have both genes in the set, let us designate them as Ss.
P Ss X Ss
Г S, s X S, s
F1 SS, Ss, sS, ss
As a result of crossing the parental individuals, the following offspring options are obtained: 1/4 of the mice with gray coloration and homozygous genotype, 2/4 of the mice with gray coloration and heterozygous genotype, and 1/4 of the mice with black coloration and, accordingly, homozygous genotype. In this crossing, splitting took place both in phenotype and genotype, as a result of which offspring appeared that did not resemble the parents.