MULTIPLE ALLELOMORPHS 207 
(second wild type) are allelomorphs. It will be ob- 
served here that the factor in the wild type gray 
mouse is responsible for the appearance in each 
hair of the three pigments, chocolate, yellow and 
d 
Fig. 51.—Four allelomorphic characters in the silkworm: a, Chinese 
striped yellow; b, Chinese moricaud yellow; c, Japanese normal yellow; 
d, Chinese plain white. : 
black. Gray is therefore a mosaic effect, for these 
colors are stratified in each hair from the base out- 
ward in the order above named. The allelomorphic 
factor for yellow gives rise te only one of these 
