No. 573] 



STUDIES OX INBREEDING 



r.23 



cent, of the number of different ancestors possible in that 

 generation, but not one single animal in the ancestry of 

 bis sire occurs in the ancestry of his dam (within the 

 limits A, to A s ). The probability is that Blossom's Glo- 

 rene is heterozygous in respect of most of his characters, 

 while King Meiia Rioter 14th is homozygous. 



The object of this paper is to call attention to the fact 

 that inbreeding of considerable degree may exist in the 

 entire absence of any kinship between the two individuals 

 bred together, and to bring forward a method of sepa- 

 rately measuring what proportion of the observed in- 

 breeding i n a particular case is due to kinship of the pa- 

 rents, and what to earlier ancestral reduplication. A pro- 

 posed coefficient of relationship is described, and its ap- 

 plication illustrated by concrete ca>es. 



