Heredity 



175 



Moreover, three pairs of contrasted characters were found 

 to behave in exactly the same manner, the number of 

 forms found being what would theoretically be expected 

 if the above product were multiplied by another series 

 represented by C 2 Cc c. 



" These results can be reduced to still simpler terms, as 

 is shown in the following table. Let N represent the 

 number of pairs of contrasted characters in the parents. 

 When they are crossed the second generation, when self- 

 fertilized, shows visible differences of 2 to the nth power. 

 These visibly different classes actually contain 3 to the 

 nth power different classes, the phenomena of dominance 

 obscuring part of them. Finally, when crossing to secure 

 combinations of n characters, we must have 4 to the nth 

 power number of individuals, to be theoretically certain 

 of at least one individual in each class. 



MENDEL'S LAW OF INHERITANCE OF UNIT-CHARACTERS 



A is substituted for R, a for r, B for T 7 , and 6 for t, and 

 instead of writing AA and aa in the series, one of the 

 letters is dropped." 



