No. 540] INHERITANCE OF COLOR IN CATTLE 



729 



nearly white to nearly red ; this may mean that the set of 

 dominant white hairs and the set of recessive white hairs 

 are not each governed by a single determiner, but by a 

 group of either many or few similarly behaving and gen- 

 erally, but not essentially, synchronously moving deter- 

 miners. This is consistent with the observed fact that all 

 matings into which roans enter produce more roans than 

 any other color. Thus it appears that, as with spotted- 



May Lily 59528. Bed. Sire— Gloster's Choice 284895. Boun. 



Dam— Mourey May 59529. Bed. Sire's Dam— Gloster Girl. Bed. 



Sire— King of Banff (Imp.) 306221. Sire 's Sire— Choice of the Ring 187237. Boan, 



ness, the degree of roanness is the somatic effect of the 

 fortuitous registering — generally in accordance with the 



each of the two independently behaving sets of hairs"; 

 this, together with the occasional intra-zygotic inhibition 

 and reaction in response to set conditions, quite com- 

 pletely explains the observed facts. Thus the registering 

 of pigments and patterns may give a measurable somatic 



