308 MR. C, C. HFltST : EXPiCRIMENTAL STUDIKS 



This case is interesting as showing that an albino extracted 

 out of a pure grey does not necessarily carry grey only, the 

 result depends upon both parents. 



No. 34 albino doe mated with a pure black gave 4 greys and 

 4 blacks ; this albino was extracted out of No. 11 grey (bl.) X 

 No. 12 grey (bl.). 



No. 38 albino buck mated with a pure black gave 3 greys and 

 2 blacks. 



No. 39 albino doe mated with two pure blacks gave 6 greys and 

 4 blacks. 



The last two albinos were extracted from No. 7 pure grey x 

 No. 10 grey (bl.). 



The three following tables give the individual matings in the 

 testing of the pure-bred and extracted albinos for their latent 

 colour-factors. 



4 albinos apparently carrying black only mated with 7 pure 

 blacks gave 34 black young, in accordance with the Mendelian 

 expectation. These 34 blacks may therefore be added to the 16 

 already recorded under extracted blacks bred together (p. 303) 

 making 50 in all, and will serve as a further illustration of the 

 purity of the black recessives. 



Table 22. 

 . Albino (black) x Black. 



Matings. , Grey. Black. 



EB19 X A2 2 



EB19 X EA14 3 



E B 20 X A 2 3 



E B 21 X A 2 4 



EB21XA2 2 



EB21 X EA14 3 



E B 33 X A 24 3 



EA45 X EB28 5 



E A 45 X B 61 4 



B 52 X A 2 5 



Total 34 



7 albinos apparently carrying both grey and black mated with 

 5 pure blacks gave 64 young, of which 32 were greys and 32 

 were blacks, which is exactly the Mendelian expectation. 



