184 



GENETICS 



56 7 



Offspring of fad 5 



Offspring* I ami 7 



FIQ. 62. A case of three generations of ear-length in rabbits, a-6, 

 average ear-length of the first filial generation (Fi). a'-b', average 

 ear-length of the F 2 generation derived from 1 and 7. Data from 

 Castle, in collaboration with Walter, Mullenix and Cobb. 



upon the ear-length of rabbits which included 70 

 different litters of rabbits containing 341 individuals. 

 In none of these experiments could the blend in the 



