18 



Tanaka. 



b) Results from the cross NynY 9 X nyny d. 



Fl females ex nYnY 9 X NyNy (Hogj'oku) c? were mated to the 

 double recessive (Arayahime) males, and 11 families produced by such 

 cross were reared durino: the summer 1913. 



It is evident that in the ovogenesis of diheterozygous normal yellows 

 a complete repulsion between N and F takes place instead of a partial 

 repulsion which occurred in the spermatogenesis. 



Depending upon the results above mentioned the gametic series 



of Ntjn Y animals ex NyNy XnYnY (either taken as the male parent) 



may be given as follows: 



NY Ny nY ny 



« , (I : 3 : :^ : 1 



hpei'iuatozoon 



1 



Eggs 



If the repulsion system 1 : 3 : 3 : 1 is assumed to e.KJst in a speiiiuito- 

 genesis the hereditary schfiiic will lie as follows: 



P XyNy X nYnY 



Fl NynY 



„ f male 1 NY : 3 Ny : 3 nY : 1 ny 



F. gametes { ^^^^^,j^ , ^^^ ^ ^ ^^^ 



