32 



Journal of Agricultural Research 



Vol. XV, No. I 



this mark but not showing it somatically produced two offspring with 

 shoulder bands and one without it. 



There are three apparent exceptions to this recessive interpretation. 

 Two bulls from Maple Grove Netta (No. 6 and 20) have shoulder bands. 

 By the pedigree given in Table XIII it is shown that Maple Grove Netta 

 must have been heterozygous for this mark ; consequently it is not to be 

 wondered at that her offspring have it when mated to a bull carrying it. 

 The other case is not quite so easy to reconcile. In the pedigree given 

 in Table XVI with this single-factor hypothesis there are two known 

 possibilities in the fourth generation to have this factor transmitted to 

 Flying Fox's Flora, the mother of the aberrant individual. This doe. 

 not leave a great chance for her to have this factor. From her other 

 breeding, however, it would look as if Flying Fox's Flora must carry this 

 white mark. 



MARKINGS OF THE RUMP 



The white markings of the rump consist chiefly of a spot whose center 

 is the tail set. This spot may be extended by fusion with the patches 

 having as their centers the middle of the flanks. These extensions will 

 be considered as two separate spots located, respectively, on the rump 

 and on the flanks. The behavior of the rump spot from the parents to 

 the offspring is shown in Table XV. 



Table XV. — Behavior of the -white markings on the rump in the parental and first filial 



generation 



Sire. 



Taurus Creamelle Henger- 

 veld. 



Do 



Do 



Kayan 



Do 



Lakeland's Poet 



Do 



Minor crosses : 



Crossbred o 



Do 



Crossbred 10 



Lady Primrose's Governor 



of the Fountain. 

 Johanna Lad Manor De Kol 

 Columbia 's Fox 



Description of mating. 



Rump spot X rump spot , 



Rump spot X 

 Rump spot X 

 rying rump 

 Solid color X 

 Solid color X 

 Solid color X 

 Solid color X 



solid color. 

 F, solid car- 

 spot. 



rump spot., 

 solid color., 

 rump spot., 

 solid color.. 



Fj solid color carrying 

 rump spot X solid color. 



Fi solid color carrying 

 rump spot X Fi solid 

 color carrying rump 

 spot. 



Fj solid color carrying 

 rump spot X rump spot. 



Rump spot X solid color . . 



do 



Solid color X solid color. 



Offspring. 



2 rump spots. 



10 solid color. 



I rump spot, I solid color. 



15 solid color. 

 7 solid color. 



1 rump spot, 2 solid color, 



3 solid color. 



2 solid color. 

 I rump spot. 



I solid color. 



Do. 



I rump spot. 

 I solid color. 



Here, also, the character of the white mark appears recessive in its 

 transmission. There are, however, three exceptions to this view, if these 

 should prove genetically what they appear to be somatically. The 



