m MODES OF RESEARCH IN GENETICS 



PEDIGREE TABLE I. (Hypothetical) 



To Illustrate the Breeding of Brother x Sister, out 

 OF Brother X Sister, Continued for a Series of 



Generations 



X 



Ancestral Generation 



a 



d 



d 



2 



1/ 



/ 



1/ 



1/ 



g 

 h 



9 

 h 



g 

 h 



g 

 h 



9 

 h 



'9 



k 



h 



g 

 h 



whence 



Zo = 



100 (0) 



2 



= 0. 



