PLATE 12 





re- 



iz.s%± 



so% 



Z5io± 



IZ.5%± 



rs 



Pu-Elp-AfAfElp-Pu 



Ff 



Pure signaticollis stock 

 IS shown when crossed tv/th 

 one of the extracted /f 

 /ines that appear also 

 as a sig type comi'ni from 

 the true breeding fi sig. type. 



Pu-Elp-Al 



At-flp-Pu Pu-Elp'Al 

 Jk // 



Pu-Elp-ApAf^Elp'Pu 



Pu -Elp-AfA^EIp'Pu 



To SHOW IN DETAIL THE COMPLICATION OF THE TEST REACTION DESCRIBED IN TEXT. 



JI.TT.IUS BIEN trrii., N. V. 



