GROSSES IffVOLVIKG SEX DETERMINATION 



MOTHER 



MFLOID 

 FATHER SONS 



DAUGHTERS DIPLOID SONS 



MD EXCSS3 

 xa/xb OP BAD E0G3 



Ko/xo and 

 xb/xc- xa/3ta op xb/xb 



vi vlofu ^/tVL tvi/r\x */ta £\i/ru 



9 

 9 



1 



1 



10 



1 

 1 

 9 

 9 

 10 



Pig. 16, Ratios of offspring axpected according to varioufl 

 arrangemants of sex alleles in crosses of vainless feisiales 

 hQterosy(;;ous for fus«d by fuaod males, P. %. Whiting, 194Sftt 



99 



