THE PROBLEM OF INBREEDING 143 



TABLE 



COMPARING THE MAXIMUM POSSIBLE VALUES OF THE CO- 

 EFFICIENTS OF INBREEDING (Z) WHEN THE COEFFICIENT 

 OF RELATIONSHIP K EQUALS (a) ZERO AND (6) 100 



plete continued brother X sister mating, where 

 K = 100. 1 



From this it appears that an individual may be 

 inbred in 10 generations to within two tenths of 

 one per cent as intensely, measured by the co- 

 efficients of inbreeding, if his sire and dam are in 

 no way related, as he would be if his sire and dam 

 were brother and sister. But clearly the germinal 

 constitution of the individual produced would be 

 quite different in the two calves. This point is 



1 Since, of course, all of a sister's ancestors are identical with her 

 brother's. 



