Final answer:
The recombination frequency between gene A and gene B is 8.4, which indicates genetic distance but is insufficient to determine the exact order of genes without additional information.
Step-by-step explanation:
The question about the recombination frequency between gene A and gene B pertains to genetic linkage and the creation of a linkage map. Since the recombination frequency is 8.4, this indicates a certain genetic distance between gene A and gene B. Without information about the recombination frequency between gene B and gene C, or gene A and gene C, we cannot conclusively determine the order of the genes simply based on the recombination frequency between A and B alone. However, the recombination frequency values can often be used to predict genetic distance which then helps to establish the order of genes on a chromosome.