APPENDIX 335 



In the 2d Experiment, 31 round and yellow, 26 round and green, 

 27 wrinkled and yellow, 26 wrinkled and green seeds. 



In the 4th Experiment, 24 round and yellow, 25 round and green, 

 22 wrinkled and yellow, 26 wrinkled and green seeds. 



There could scarcely be now any doubt of the success of the 

 experiment; the next generation must afford the final proof. 

 From the seed sown there resulted for the first experiment 90 

 plants, and for the third 87 plants which fruited: these yielded 

 for the 



1st Exp. 3rd Exp. 



20 25 round yellow seeds AB 



23 19 round yellow and green seeds ABb 



25 22 round and wrinkled yellow seeds AaB 



22 21 round and wrinkled green and yellow seeds .... AaBb 



In the second and fourth experiments the round and yellow 

 seeds yielded plants with round and wrinkled yellow and green 

 seeds, AaBb. 



From the round green seeds, plants resulted with round and 

 wrinkled green seeds, Aab. 



The wrinkled yellow seeds gave plants with wrinkled yellow and 

 green seeds, aBb. 



From the wrinkled green seeds plants were raised which yielded 

 again only wrinkled and green seeds, ab. 



Although in these two experiments likewise some seeds did not 

 germinate, the figures arrived at already in the previous year were 

 not affected thereby, since each kind of seed gave plants which, as 

 regards their seed, were like each other and different from the 

 others. There resulted therefore from the 



2d Exp. 4th Exp. 



31 24 plants of the form AaBb 



26 25 " " " " Aab 



27 22 " " " " aBb 

 26 27 " " " " ab 



In all the experiments, therefore, there appeared all the forms 

 which the proposed theory demands, and they came in nearly 

 equal numbers. 



In a further experiment the characters of flower-colour and 

 length of stem were experimented upon, and selection was so made 

 that in the third year of the experiment each character ought to 

 appear in half of all the plants if the above theory were correct. 

 A, B, a, b serve again as indicating the various characters. 



