No. 639] INHERITANCE OF BLUE IN POULTRY 311 



splashed. From the nature of the behavior of the factors 

 R and E already described, this would make no difference 

 with regard to the blue offspring, for the blue progeny of 

 a blue Andalusian female by a white Wyandotte male 

 would be of exactly the same composition with respect 

 to R, E, and P as all the offspring of a blue-splashed 

 Andalusian mother by the same sire. 



It will also be noted in this group (5) that while the 

 father of the blue was a white Wyandotte, the male 

 used in this cross was a white Plymouth Eock. Since it 

 has been sho^\^l that for the factors being studied, white 

 Plymouth Eocks and white Wyandottes are identical, this 

 should not affect the ratios. 



VIII. The Fo Eatios feom Blue-splashed Axdalusiax 

 X Eecessive White Matings 



The Fo ratios from various blue-splashed Andalusian 

 X recessive white crosses are shown in Table IV. 



As will be seen, the four Fg classes predicted for 

 such crosses in the writer's earlier paper {1918a, p. 113) 

 on the basis of the Fi results, have been obtained. Xo 

 other classes have appeared. This would seem to indicate 

 that the factorial compositions of the blue-splashed 

 Andalusians and white Wyandottes then proposed were 

 convct ;ni(l that tlii^ white Plynunitli Eocks used were of 

 the >ix\nv (•{.iiiposliioii witli ivsixrt to the factors R, E 

 and E as wciv the white AVyandottes. 



Seven l\ blue males were used in securing the Fo 

 ratios. The legband numbers of these males may be 

 found in Table IV, in the column headed " Band No." 

 The direction of the original cross is indicated for each 

 male and for the group of females witli wliieh Ik^ was 

 mated. The direction of the cross was the ^nm.' for tlie 

 males and the females in all cases but two. .M;il..< iNinr 

 and 258:\[ were mated witli females wliieh were rir.uhiets 



