346 



THE AMERICAN NATURALIST [Vol. XL VI 



eration derived in Table I is composed of the three ty 

 in the same ratio as in the parental generation. 7 



TABLE I 



Heterozygous 



As a second example, the ratio 2:2:2 may be taken. 

 This will give the results shown in Table II. The ratio 

 2:2:2 is not constant, but stability is reached in F x , 

 which is found to show the same ratio as onr previous 

 case, viz., 1:2:1. 



TABLE II 



