Final answer:
Recombinant offspring in a test cross involving dihybrid flies have a different combination of traits compared to the parental generation. This suggests that the two traits being studied are linked and located on the same chromosome.
Step-by-step explanation:
In a test cross involving dihybrid flies, recombinant offspring are those that have a different combination of traits compared to the parental generation.
These offspring are the result of a crossing over event during meiosis, where genetic material is exchanged between homologous chromosomes. The observed result of producing more parental-type offspring than recombinant-type offspring suggests that the two traits being studied are linked and located on the same chromosome.