Answer:
c. 1:1:1:1
Step-by-step explanation:
Dihybrid organism is an organism that is heterozygous at two different genetic loci. So, for example if there are two loci A and B, dihybrid organism would have AaBb genotype. Homozygous recessive for alleles at two loci has the genotype aabb.
P: AaBb x aabb
The possible genotypes are: AaBb Aabb aaBb aabb