In some birds black feathers are incompletely dominant over

In some birds black feathers are incompletely dominant over white feathers. A bud with an allele for black feathers and an allele for white feathers will be gray in color. What would be the phenotypic ratio among the offspring of a gray female mated with a: Black male? Gray male? White male?

Solution

Answer:

BB: Black

bb: White

Bb: Gray

a). Gray (Bb) X Black (BB)---------Parents

BB : Bb = Black : Gray= 1 : 1

b). Gray (Bb) X Gray (Bb) --------------Parents

Black : Gray : white = 1:2:1

c). Gray(Bb) X White (bb)-----Parents

Bb (gray) : bb (white) = 1:1

	B	b
B	BB, black	Bb, gray
b	Bb, gray	bb, white