THEORY OF EVOLUTION 79 



and is known as A. lacticolor. When these two 

 types are crossed they exhibit exactly the same 

 type of heredity as does the black-barred com- 



FIG. 40. Reciprocal of Fig. 39. 



bination in the domestic fowl. As shown in 

 figure 41, lacticolor female bred to grossula- 

 riata male gives grossulariata sons and daugh- 

 ters. These inbred give grossulariata males 

 and females and lacticolor females. Recipro- 

 cally lacticolor male by grossulariata female, 



