PRINCIPLES OF HEREDITY 



17 



have 1 : (1) Red uniting with red; (2) red with white; 

 (3) white with red; (4) white with white, or: 



1 RR 1 RW 1 WR 1 WW 

 Since RW and WR are alike, 



1 RR 2 RW 1 WW 



If we suppose that each plant produces only four seeds, 

 and that it follows the average, we should get the following 

 results, starting with one hybrid: 



First Generation 



Second Generation Third Generation 



{Pure White 

 Pure White 

 Pure White 

 Pure White 



Red Hybrid. . . 





{Pure White 

 ged gybrid 

 Red Hybrid 

 Pure Red 



Pure White 



Hybrid 



1RW 



v Pure Red 



1RR 2RW 1W 



Pure 



Red 



f Pure Red 



I Pure Red 



' | Pure Red 



[Pure Red 



6RR 4RW 6WW 



An interesting example of dominant and recessive 

 characters is in eye color in man. Dark color is dominant 

 over blue or light color. If a person has light-colored 

 eyes, it is evident that the dark color is not present, else 

 it would show. Those who have dark eyes may or may not 



lf The pea is a self-fertilized plant, 

 mathematics is more complex. 



With cross-fertilized plants, the 



