The recombination frequency between the purple and vestigial

The recombination frequency between the purple and vestigial genes is 10.7% Great, but what good is RF?? Comparison of recombination frequencies between different genes can be used figure out the order of genes on a chromosome!!! to For example, if we look at recombination frequencies among all three possible pairs of genes C,AB, BC), we can figure out which genes furthest apart, and which other gene lies in the middle Using the RF\'s you obtained for loci (A, B,co you want to map (below). Draw the genetic map. RF (A-B) 13.2% RF (B-C) 6.4% RF (A-C) 18.5%

Solution

One % Recombination Frequency (RF) = 1 map unit = ~1000000 bp

RF between A - B = 13.2%; RF between B-C = 6.4%; RF between A-C = 18.5%

Based on these RF values we cannot draw a genetic map to these genes. Because it is 3 point cross and need to produce 2 RF values. In case 3 Values present, the sum of any two RF should equal to 3rd RF. Here this condition not exist. So mapping is not possible