Heredity 163 



of trial plants was 500, of which 428 had green pods and 

 152 yellow pods. Consequently these stand in the ratio 

 2.82 to 1. 



Experiment 6. Position of flowers. Among 858 cases, 

 651 had inflorescence axial and 207 terminal. Ratio 3.14 

 to 1. 



Experiment 7. Length of stem. Out of 1064 plants 

 in 787 cases the stem was long and in 277 short. Hence 

 a mutual ratio of 2.84 to 1. 



If the results of the whole experiment be brought to- 

 gether, there is found, as between the numbers of forms 

 with the dominant and recessive characters, an average 

 ratio of 2.98 to 1 or 3 to 1. 



The following is an account of Mendel's results with 

 peas in their third hybrid generation (F 3 ) : 



These forms which in the F 2 generation exhibit the 

 recessive character do not further vary in the F$ generation 

 as regards this character : they remain constant in their 

 offspring. 



It is otherwise with those that possess the dominant 

 character in the second generation. Of these, two-thirds 

 yield offspring that display the dominant and recessive 

 characters in the proportion of 3 to 1, and thereby show 

 exactly the same ratio as the hybrid forms, while only 

 one-third remain with the dominant character constant. 



The separate experiments yield the following results : 



Experiment 1. Among 665 plants which were raised 

 from round seeds of the second generation, 193 yielded 

 round seeds only, and remained, therefore, constant in 

 this character; 372, however, gave both round and 

 wrinkled seeds, in the proportion of 3 to 1. The number 



