Figure 15.2 -In a series of mapping experiments, the recombination frequencies for four different linked genes of Drosophila were determined as shown in Figure 15.2. What is the order of these genes on a chromosome map?
A) rb-cn-vg-b B) vg-b-rb-cn C) cn-rb-b-vg D) b-rb-cn-vg E) vg-cn-b-rb