106 THE AMERICAN NATURALIST [Vol.XLV 



blended inheritance. One, however, must not be misled to 

 conclude that continuous variation necessarily means 

 failure of segregation, since on the contrary apparent 

 continuity may be a resultant of combinations of various 

 segregating characters. Whether or not given data indi- 

 cate a segregation, may be variously tested by some other 

 means according to the nature of the experiment. 

 From the above we draw the following conclusions: 



1. The series obtained from the square of the binomial 

 expresses the distribution of determinants for both alter- 

 native and blended inheritance. 



2. Blended inheritance may be considered to be a limit- 

 ing case of alternative inheritance where dominance is 

 imperfect. Thus Mendel's law of alternative inheritance 

 may be considered as the standard and all other cases 

 referred to it. 



3. DeForest's formula with its limiting case ade- 

 quately represents frequencies of all known cases of 

 inheritance when the number of allelomorphic pairs of 

 characters is large, especially when quantitative meas- 

 urements are considered. 



