In cocker spaniels, black coat color (B) is dominant over red
(b), and solid color (S) is dominant over spotted (s).

(a) If a red solid male was crossed with a black solid female to
produce a red spotted puppy, the genotypes of the parent (with male
genotype first) would be?

(b) If red spotted male was crossed with a black solid female
and all the offspring from several crosses, expressed only the
dominant traits, the genotype of the female would be?

I know those answers, but I’m still confused. Explain
please.