Answer:
The correct answer is 16 boxes.
Step-by-step explanation:
A cross between two different genes or lines that vary in 2 observed traits is the dihybrid cross. By Mendel's law, in between the alleles of both these loci, there is a dominance -recessive relation.
Different combinations of alleles, create a 4 square by 4 square Punnett square. It means there will be four into four alleles in the gametes form 16 offsprings in 16 boxes with genotype of 9:3:3:1
Thus, the correct answer is 16 boxes.