70 Mendel's Experiments 



angular and yellow ; the fourth is constant in both recessive 

 characters, so that the seeds are angular and green. In 

 both these experiments there were consequently four sorts 

 of seed to be expected viz. round and yellow, round and 

 green, angular and yellow, angular and green. 



The crop fulfilled these expectations perfectly. There 

 were obtained in the 



1st Experiment, 98 exclusively round yellow seeds ; 



In the 2nd Experiment, 31 round and yellow, 26 round 

 and green, 27 angular and yellow, 26 angular and green seeds. 



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

 and green, 22 angular and yellow, 27 angular and green 

 seeds. 



A favourable result could now scarcely be doubted ; 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 angular yellow seeds . . AaB 



22 21 round and angular green and yellow seeds AaBb 



In the second and fourth experiments the round and 

 yellow seeds yielded plants with round and angular yellow 

 and green seeds, AaBb. 



From the round green seeds plants resulted with round 

 and angular green seeds, Aab. 



The angular yellow seeds gave plants with angular 

 yellow and green seeds, aBb. 



From the angular green seeds plants were raised which 

 yielded again only angular and green seeds, ab. 



