288 MK. C. C. HUEST : EXPEKIMENTAL STUDIES 



2 short-coated hybrids of the first generation mated back with 

 the original short produced 20 young, of which 17 were reared. 

 All had short coats similar in appearance to the pure and hybrid 

 sliorts, iu accordance with the Mendelian expectation. 



The matings were as follows : — S 1 x H 12 gave 11 shorts in 

 two litters, and S 1 X H 10 gave 6 shorts in one litter. 



(e) Third Generation (F3). 



The xlngoras of the second generation extracted from the 

 hybrid shorts of the first generation bred quite true when mated 

 together and with pure-bred Angoras. 



9 extracted Angoras mated together and with Angoras 

 produced 41 Angora youag, all indistinguishable from pure- 

 bred Angoras, in accordance with the Mendeliau expectation. 

 26 of these were raised from the extracted Angoras bred 

 together. 



The individual matings were as follows. E A = Extracted 

 Angora. Nos. 26, 33, 37, 53, and 54 were extracted from 

 H X H, while ISTos. 16, 20, 41, and 42 were extracted from 

 H X A. 



Table 4. 



Extracted Angoras x Angoras (F3). 



Matings. Short. Angora. 



E A 16 X A 2 5 



E A 20 X A 2 4 



E A 33 X A 24 6 



E A 33 X E A 37 7 



E A 42 X E A 20 6 



E A 53 X E A 37 7 



EAo4 X EA41 6 



Total 41 



The extracted Angoras, like the pure-bred Angoras, proved to 

 be recessive to pure shorts. 4 extracted Angoras mated with 

 3 pure and 1 extracted short produced 27 short-coated young, 

 similar in appearance to the pure and hybrid shorts. 



The matings were as follows (E IS = Extracted pure 

 Short) :— 



