Answer:
B
Step-by-step explanation:
A punnet square is a method used to find the possible offspring and the probability of each genotype. A punnet square uses the alleles of the parents to find the possible outcomes of the offspring.
To correctly use a punnet square you must split the alleles of each parent and separate them into different boxes. For example, the alleles Bb were split on the top into B and b while the other alleles, bb, were split on the side. Then write each letter into the boxes directly below or beside them. This means the letters on the top should fill the boxes below them and the letters on the side should fill the boxes beside them. For example, B was written in both of the boxes on the right side that were below where it was originally placed.
Option B is the only choice that correctly fills out the punnet square.