No. .3.30] 



GAMETIC COUPLING 



585 



ored-horny. On the other hand, if the correlations re- 

 sult from selective pollination, no correlation should ap- 

 pear in such a cross since the pollen is all of one kind. 

 Ears that represent crosses of this kind are described in 

 Table IV. It will be seen that in all of the seven ears 

 there is a significant correlation. 



It is interesting to note that in two ears, Nos. 250 and 

 401, while the correlation is relatively high, it is reversed ; 

 i. e., the positive correlation is between colored aleurone 

 and waxy endosperm instead of between colored aleurone 

 and horny endosperm as was the case in the original F 2 



that in these ears where associations in the gametes were 

 excluded no correlations were subsequently produced. 

 The results in Table IV further show that excluding the 



