68 



The Journal of Heredity 



the fur is black in color there is a vast 

 difference in shade, density, pattern 

 arrangement, and luster. In the Fi 

 generation no extremely high class 

 skins were obtained, although some of 

 the skins from this first cross sold as 

 high as $18.00 to S25.00. Due to the 

 heterozygous condition of Pultava 

 there were only a few high class skins 

 produced in the second cross; however, 

 had Pultava been homozygous for 

 black and free from red, high class 

 skins would have been much more fre- 

 quent, due to the fact that the desirable 

 qualities previously mentioned are 

 unquestionably closely correlated with 

 black color. The lambs having high 

 class skins should be of the zygotic 

 form (BBrr) with respect to color 

 factors. The zygotic constitution of 

 the grade ewes is, therefore, very sig- 

 nificant also. 



Professor R. Owen Wahl, of South 

 Africa, who has bred fur sheep for years, 

 reports similar results from using one 

 particular ram of supposed full-blood 

 origin. His results check with the data 

 presented. They obtained all forms of 

 blacks, spotted, reds and whites. 



The Karachiev is a strain of fur- 

 bearing sheep in which the rams nor- 

 mally have four horns, while the ewes 

 have only two. A six-horned ram was 

 dropped by a normal two-horned Kara- 

 chiev ewe, at the Dawley Farm, 

 Fayetteville, N. Y. The sire of this 

 six-horned individual was a normal 

 four-horned Karachiev ram. In all 

 cases where this six-horned ram has been 

 bred to Karachiev ewes the ram lambs 

 have had the normal four horns and the 

 ewe lambs two horns. He has been bred 

 to a few Lincoln ewes and none of the 

 lambs have had horns, although lambs 

 of both sexes have been produced. 



Table I 

 Zygotes 

 Pjiltava.X75% Fi Ewes. = Black. Black. Black. Red. 



1. (BbRRX(Bbrr) = (BBRr) (BbRr) (BbRr) (bbRr) 



Black. Black. Black. White. 



2. (Bbrr)X(Bbrr) = (BBrr) (Bbrr) (Bbrr) (bbrr) 



Red or 

 Black. Black. Black. Black. Black. Black, spotted While. 



3. (BbRr) X (Bbrr) =(BBRr) (BBrr) (BbRr) (Bbrr) (BbRr) (Bbrr) (bbRr) (bbrr) 



Table II 



Theoretical Possibilities: 

 Obtained Results: 



Total 



X21.75 



174 



174 



Black 

 6 

 130.5 

 121 



Red or Spotted 

 1 

 21.75 

 28 



White 



1 

 21.75 

 25 



Table III 



PultavaX25% Fi Ewes. 

 Blk. Blk. Blk. Blk. Blk. Blk. Blk. Blk. 



(BBRr) (BBRr) (BbRR) (BbRr) (BBRr) (BBrr) (BbRr) (Bbrr) 

 (BbRr) X (BbRr) = Spotted Spotted 



Blk. Blk. Red. or Red. Blk. Blk. or Red. White. 

 (BbRR) (BbRr) (bbRR) (bbRr) (BbRr) (Bbrr) (bbRr) (bbrr) 



