64 B3 t}'-i ^mm^ CO mm ~m 



AB Ab aB ab 



? 1 : 1 



J 1 : 3 : 3 : 1 

 the resulting zygotic series will lie the uormal ratio 9 A-B- : 3 A-b- : 3 a-B- 



1 a-b-.*' 



A similar result may be obtaiued by mating Fi females ex A ABB x aabb 

 to Fl males ex AAbb x aaBB. 



The actual figures aud other details of my experiments concerning the sub- 

 jects dealt with iu the present work will be descriljed in separate papers. 



College of Agriculture, 



Tohoku Imperial university, 

 Sai>poro. 



1) Such result will not be obtained from the reciprocal cross, AaBb S^ x Aabb ^. As the 

 comiilete reduplication occurs in the AaBb female, the otPsining of such cross will be 2 A-B- : 1 Aabb : 

 1 aabb or 1 AaBb : 2 A-b- : 1 aaBb according to whether A and B were carried in by the s:ime 

 jiarent in (he original cross or they were brought together by different jjarents. 



m M 



