W. E. Castle 



A glance at these tables shows with what persistency a Mendelian 

 character manifested as a maternal character only may be ex- 

 pected to crop out in the progeny of a mixed race, even when re- 

 peatedly excluded by selection. The dominant character, red, 



TABLE I 



Expected results of selecting white ears only from a mixed race produced by a cross betiheen a pure red and 



a pure white variety of maize 



TABLE 2. 



Expected results of selecting red ears only from a mixed race produced by a cross between a pure red and a 



pure white variety of maize 



has the lead at the outset, since all F^, plants bear red ears, and 

 this ascendency it holds through three successive selections, but 

 beyond that point selection for the recessive character, white, 

 takes the lead and this lead it increases at each successive selec- 

 tion. Nevertheless after ten selections have been made the white 



