No. 588] 



F 1 BLEND AND GENIC PURITY 



751 



always dominant white, and Area 2 is always red, and we 

 never find an individual red in Area 1 and white in Area 

 2, although solid whites and solid reds, and bi-colored 

 individuals of the first specified type are common. The 

 reversed pattern, i. e., red in Area 1 and white in Area 2, 

 would occur if the genes "W" for Area 1 and "R" for 

 Area 2 were completely segregable, i. e., if they lay in dif- 

 ferent chromosomes. For a further explanation of this 

 mode of blending inheritance see the accompanying chart, 

 "Coat-color in Short-horn Cattle." 



