Assume that we are trying to map four genes in a chromosome. Given the following recombination frequencies, what will be the sequence of the genes in the chromosome? 
Recombination frequencies: 
                        A-B = 25% 
                        B-C = 15%
                        A-D = 15%
                        B-D = 40% 

• A. B-C-D-A
• B. A-C-B-D
• C. B-C-A-D
• D. D-B-A-C

Answer: (C)