Figure 4.
Schematic model of the map position of the two loci controlling female discrimination in D. ananassae (red bar) and D. pallidosa (green bar). Upper bars on the graphs represent the genetic construction of the second chromosome, blue for the chromosome of D. ananassae and yellow for that of D. pallidosa. Other chromosomes are not shown. Graphs under the chromosomes indicate the mating success patterns in females having the second chromosome shown above. (A) Dl Om(2D) D. ananassae females. (B) Wild-type D. pallidosa females. (C) F1 hybrid females. (D) Repeated-backcross females (class 1). (E) Repeated backcross females (class 2).