Coat color in mammals is often determined by epistasis. In mice, the B gene codes for the type of pigment: BB and Bb result in black pigment and bb results in brown pigment. A second gene, C, determines if the pigment is incorporated into the hair shaft: CC and Cc individuals have pigment in their hair but cc individuals are always white. A BBCC (black) individual mates with a bbcc (albino) individual to produce F1 offspring. If two F1 offspring mate, what is the phenotypic ratio of the F2 offspring? Show your work with a Punnett Square.