Final answer:
A dihybrid cross can demonstrate the independent assortment of genes, with alleles for different genes sorting into gametes independently and potentially leading to a variety of offspring phenotypes.
Step-by-step explanation:
A dihybrid cross may demonstrate the independent assortment of genes. When examining a dihybrid cross, Mendel's law of independent assortment can be observed. This principle states that the alleles of different genes are sorted into gametes independently of each other. Therefore, the correct answer from the provided options is 'b. Independent assortment of genes.' For example, when considering two characteristics such as seed color and texture, there are multiple possible combinations for the alleles, leading to a variety of phenotypes in offspring. This differs from monohybrid crosses, which only involve one gene and demonstrate dominance and segregation of alleles.