PLANNING A NEW PLANT 205 



marries one having blue eyes. It is obvious 

 that no individual child of this union can 

 have both black eyes and blue eyes. In point 

 of fact, it is a matter of common observation 

 that the offspring in such a case will have 

 dark eyes. 



But it has also been observed that the blue 

 eyes of one of the parents may reappear in the 

 second generation. 



The tendency to blue eyes was entirely sub- 

 ordinated or submerged in one generation, yet it 

 was by no means eliminated, as its reappearance 

 in the next generation clearly proves. 



Similar instances without number may be 

 studied from our plant experiments; for ex- 

 ample, the case of the white blackberry. If 

 flowers of this kind are fructified with pollen 

 from flowers of a blackberry of the usual color, 

 the hybrid progeny of the first generation will 

 all bear black fruit. 



The quality of blackness has proved prepotent 

 or dominant, and the opposed quality of white- 

 ness has been totally subordinated so far as this 

 generation is concerned. 



But if these black hybrid blackberries are 

 cross-fertilized, from the seed thus produced 

 there will spring a generation of brambles, some 

 members of which will in due season produce 



