P. cynomolgi Ceylon infection phenotypes of F2 female progeny from crosses of six F1 females with their sibling males. (A) Intensity of infection was plotted against the total number of oocysts, both normal and encapsulated, per female midgut. N = 167. (B) Encapsulation responses of 123 infected F2 females. The number of F2 females was plotted against the fraction of oocysts encapsulated per midgut.