110 



Shull. 

 Table IV (continued). 



Again expectation has been fully realized in that the families in 

 this table fall clearly into the two anticipated groups. The highest 

 ratio in the second or heterozygous group is 4'79 : 1 and the lowest 

 1'97 : 1, and both these ratios are within the theoretical range of 

 families of the size dealt with in these studies and having a chance 

 distribution about the expected ratio 3:1. If the number of families 

 tested were large enough, there should be in the second group twice 

 as may families as in the first group. Of the 39 families here included 

 the expected numbers in the two classes are 13 and 26 respectively 

 instead of 8 and 31 as actually found. In numbers so small as these, 



A second sowing from same lot of seeds that produced the preceding family. 



