Lippincott: 
A Hen Which Changed Color 
A BLUE-BARRED AND A BLACK-BARRED CHICK 
These two chicks were among the offspring from the mating of white Plymouth Rock 155M and 
blue Andalusian C2032 during the season of 1919. The barring factor was brought in by the male. 
“Tt is evident that C2032, though snowy white, was continuing to breed as a blue Andalusian.” 
Photograph by James Machir. (Fig. 6.) 
produced only white chicks, unless it 
was the kind of white peculiar to the 
Japanese Silky. A genetically domi- 
nant white female would also have pro- 
duced only white offspring, if she were 
homozygous. If she were heterozy- 
gous dominant white but homozygous 
for P, half her chicks by a white Ply- 
mouth Rock would have been white 
and half pigmented. Other possible 
combinations might be suggested, but 
none fits the case except the assump- 
tion that she is genetically a blue An- 
dalusian though a beautiful snowy white 
in appearance. A similar conclusion is 
reached from the results of her mating 
with white Wyandotte ~ 206M. A 
photograph of the hen after she had 
become completely white is shown on 
the following page. 
REFERENCES 
Bateson, W., and Punnett, R. C., 1906. Reports to the Evolution Committee of the Royal 
Society, III pp. 11-23. 
Castle, W. E., and Phillips, John C., 1911. On germinal transplantation in vertebrates. Carnegie 
Inst. of Wash. Pub. 144, pp. 26. 
(Finch, W. Coles), 1909. Miscellanea VII. Note on partial leucosis ina hen. Biometrika 7:234— 
236 
Lippincott, W.A., 1918. The case of the Blue Andalusian. Amer. Nat. 52:95-115. 
Weismann, A., 1893. The germ-plasm. 
New York. 
Eng. trans. by W. N. Parker and Harriet Roénnfeldt. 
