The Genetics of Speciation by Reinforcement
Figure 1
Experimental Design to Substitute Chromosomes or Chromosomal Regions Derived from Sympatry into an Allopatric Background and Measure Their Effect on Mating Discrimination
F1 male-parent backcrosses (A) allow measurements of whole chromosome effects, while F1 female-parent backcrosses (B) measure specific chromosomal region effects. Curved arrow represents the reciprocal backcross of the one shown.