EVIDENCE OF GERM CELL SELECTION 



395 



depending on whether or not they contained determiners for 

 brachydactyly, Polydactyly, or both. Such a situation supplies 

 the necessary conditions for a test of germinal selection. Since 

 Leghorn white is dominant, and all germ cells of the females 

 necessarily carried determiners for this trait, no critical data 

 bearing on color selection were to have been expected from this 

 experiment. 



TABLE 2 



General summary of data from the four experiments 



1 As explained in the text, this figure is probably too large, owing to the method 

 of recording in 1-C. 



C. The control part of the experiment, running from February 

 15 to April 18, was not originally intended for this purpose, but 

 rather to supply data for the study of the normal heredity and 

 embryology of several traits, including those considered here. 

 Consequently some of the data, especially those relative to fertil- 

 ity, were not entered in strict accordance with the form adopted 

 in the other experiments. However, this set of data is easily 

 comparable with the other sets and, except for fertility, un- 

 doubtedly furnishes a reliable control. Of the 362 eggs laid 



