54 



Plant Genetics 



crossed, that is, the same phenotypes, but three different 

 ratios were obtained because the genotypes were different. 



® ® 



RedPaiail 



While Paienl 



& Q 



Fig. q. — Diagram illustrating behavior of complementary factors 

 in cross between red-grained and white-grained corn. R and C must 

 both be present to produce red-grained corn. 



The striking feature of this situation is that one can 

 cross two whites and get a red. This gives an insight 

 into the so-called phenomenon of reversion. For ex- 



