SIMILAR EFFECTS 113 



323 70 30 



It will be seen that the blacks are about three times as 

 many as the greys and whites together and the greys 

 about three times as many as the whites. Thus, we 

 have the following two-pair set : 



But the same white variety was mated with still 

 another black, with the result that still another pair 

 of factors was disclosed. The nature of the hybrids is 

 not mentioned, but four of them were bred from, and 

 their progeny were as follows : 



