No. 540] INHERITANCE OF COLOR IN CATTLE 739 



Calf No. II. Max Rosewood. Bot 

 Dam— Rosewood 86. Roan. 

 Dam's Dam — Rosewood 81. Bo 

 Dam's Sire— Pride of Day. Bo 



Calf No. HI. Wall Street. Whit 

 Dam— Wedding Gift 16. Roan 



alf No. IV. Sir Collin Campbell. 



Bed, little White. 

 Dam — Ury Lassie. Red, little Wh 

 Dam's Dam— Ury of Greenwood. 



Bed, little White. 

 Dam's Sire — Royal James. Bed. 

 alf No. V. Max Clipper. Bed. 

 Dam— Miss Council. Roan. 

 Dam 's Hani Christina. Bocin. 



Precisely this phenomenon was paralleled experimen- 

 tally and given a clear Mendelian explanation by Daven- 

 port, 11 who mated the dominant white of the Leghorn 

 fowl with the recessive white of the Silkie. The 

 Fj generation, save for some red on the wings of the 

 males, was white; this Fj generation mated inter se gave 

 some individuals with the typical ancestral Jungle fowl 

 coloration. The fact that the Park cattle generally breed 

 white but occasionally throw a red or a black calf means 

 that generally the germ cell formula is (W 2 R 2 ), which will 

 throw all white, but sometimes is (W W R 2 ), a strain of 

 which introduced into a breed will throw the " occasional 

 red calf." The introduction of a strain of partial albin- 

 ism seems to effect this cleavage and apparently is 

 brought about as follows : 



""New Views about Reversion," Proceedings of the American Philo- 

 tophical Society, Vol. XLIX, No. 196, p. 294. 



