474 GENETICS IN RELATION TO AGRICULTURE 
of Jersey, as is shown by the evidence from Jersey-Angus crosses reported 
by Kuhlman, the 7; of which is black. A little definite experimental 
evidence on these problems would be of more service than much 
speculation. Tak 
J. Wilson arranges the entire series of coat colors in a system of multi- 
ple allelomorphs much like the one he advocates for the inheritance of coat 
color in horses. The essential features of this system are shown in Fig. 
189. This formulation, however, falls down in one important instance 
b bv b4 br B 
Bb Boe Bb Bor BB 
Blue-roan Brindle Dun Black Black 
By} 1 black 1 black 1 black 3 black:1 red | All black 
2 blue-roan 2 brindle 2 dun ; 
1 white 1 brown 1 light dun | | 
bb brbv | brbt brbr 
Roan Red brindle Yellow Red 
br} 1lred 1 red 1 red All red 
2 roan 2 red brindle 2 yellow 
1 white 1 brown | 1 light dun 
bab babe | baba 
i Light brindle Light dun 
be 1 light dun All light dun 
2 light brindle 
1 brown 
bb bebe 
be 0 Brown 
All brown 
bb 
b | White 
All white 
Fie. 189.—Wilson’s interpretation of the inheritance of coat color in cattle. The factors 
are B, black; b’, red; b2, light dun; bY”, brown; and b, white. 
in which we have definite evidence. Lloyd-Jones and Evvard report the 
production of some red animals in F’2 in matings of Ff blue-gray animals 
from a cross between the black Galloway and the white Shorthorn. 
Such a result is entirely unprovided for in Wilson’s scheme, and very 
probably other portions of it would break down before critical experi- 
mental tests. 
Of other characters in cattle, the white-face pattern of Hereford cattle 
is dominant to colored face. Fig. 190 shows a typical instance of this 
kind. This dominance of the white-face pattern extends to species 
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