Answer:
B = Brown, b = blue
BB & BB = 100% Brown, 0% Blue
BB & Bb = 100% Brown, 0% Blue
Bb & Bb = 75% Brown, 25% Blue
Bb & bb = 50% Brown, 50% Blue
bb & bb = 0% Brown, 100% Blue
Step-by-step explanation:
Reference the Punnett square. The brown gene when mixed with a blue gene in one of the four squares is always dominant.