An incomplete Punnett square is shown below. Complete the Punnett square by typing the correct combination of letters in each box.

Answer:
BB Bb
Bb bb
Explanation:
Capital letters usually stand for dominant traits,while short letters are used to represent recessive traits. In this case the result of this cross is:
BB: Dominant Homozygous (25%)
Bb: Dominant Heterozygous (50%)
bb: Recessive Homozygous (25%)
BB Bb
Bb bb