SCOPE OF GENETICS 41 



of matings giving very curious distributions 

 of the characters of type and variety among 

 the two sexes. And then, what is perhaps 

 the most singular fact of all, that the wild 

 typical grossulariata female can when crossed 

 with the lacticolor male produce all females 

 lacticolor. This last fact can, we know, mean 

 only one thing, namely that these wild females 

 are in reality hybrids of lacticolor; though 

 since the males are pure gros$ulai*iata, that 

 fact would in the natural course of things 

 never be revealed. 



When we encounter such a series of 

 phenomena as this, our business is to find 

 a means of symbolical expression which will 

 represent all the factors involved, and show 

 how each behaves in descent. Such a system 

 or scheme we have at length discovered, and 

 I incline to think that it must be the true 

 one. If you study this case you will find that 



