May i9i?.j s. S OH AH A .—GENETIC STUDIES OF SOME CHARACTERS 101 





9 : 7 gro 



up 





3 : 1 group 



I 



176 : 130 





I 



157: 52 



V 



168 : 115 





V 



159 :15 





314 : 215 







316 :97 





n = 589 







n = 113 





a- ±11.69 







|a=±6.25 





<t = + 12.04 







<7=±8.80 



Then we are inclined to think the heterozygous Fo-individuals 

 split into 3 groups, namely homozygous group, (9 : 7)-group and 

 (3 : l)-group in ratio 1:4:4. 



Through the results of the experiments we have obtained 

 the true nature of individuals of F,> and if we suppose the 

 formation of parchment-like lining is due, as we did before, to 

 two complementary factors, say L and D 15 we may think one 

 of the parents has L gene in its factorial composition but not 

 D and the other parent D but not L according to the hypo- 

 thesis of " Presence and absence," then we can formulate the 

 composition thus :— 



P LLdd DD11 



F, DLdl 



DDLL + 2DDLl+2DLLd + 4DLdl (1) 



F 2 JDDll + LLdcl + ddll (2) 



2Dlld + 2Lddl (3) 



If we examine the factorial formula? we can easily pre- 

 suppose what will come out in F ;; . The numbers of (1) are 9 

 out of 16 and each has two complementary factors so that 

 they are all hards while the remaining, 7 in number, arc softs 

 and those in (1) and (2) are constant soft but those in ^1 ) 

 excepting the first term split in the following way : — 



1 DOLL 1 : 1 



2 \)\)\A 3: 1 2] , 



2 DLLd 3 :1 2J 



4 DLdl 9:7 I- 



Comparing the results of tin- experiments with the pre- 

 supposition induced from the factorial composition we see that 



1 Supposing tin- bard flank U due t<> lignifi< I inds 



I), derelopi r. 



