The northeastern Kansas wildcat can have a blue, red, or purple
coat. The blue and red wildcats are pure breeding, while the purple
wildcats are not; when two purple wildcats are crossed, they give
rise to a 1:2:1 ratio of red:purple:blue offspring

a) How many genes do you think are responsible for controlling
coat color?

b) What phenotype(s) would you expect and in what ratio from a
cross between red wildcat and a blue wildcat?

c) What term (one word) best describes the genetic basis of the
purple coat color?