64 HI ti'— ^-1 fA *in na 5t o tvf m-m 



AB Ab aB ab 



? 1 : 1 



Jl:3:3:l 

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



1 a-b-.^' 



A similar result may be obtained by mating Fi females ex AABB x aabb 

 to Fi males ex AAbb x aaBB. 



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

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



College of Agriculture, 



Tohoku Imperial University, 

 Sapporo. 



1) Sucli result will not be obtained from the recij^rocal cross, AaBb ^ x Aabb -g-. As the 

 complete reduplication occurs in the AaBb female, the ofEsi^ring 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 same 

 l^arent in the original cross or they were brought together by different parents. 



M^-^rmfMumbfz^ij^\^)-atz> ^^n b o mhm^'^'^ b x\x-m7t\^Mo 

 u 



