374 



Maternal Inheritance and Mendelism 



The respective figures obtained in each mating in every generation 

 are represented in Table IV which will be summarized as below : 



(Normal x grey No. 24) 



Ft eggs 



r 

 I 

 Fi eggs N 



F3 eggs iV 



I 



Fi eggs N 



Ffi eggs N 



Fg eggs N 



N 



1 



{N + G) 



N (O + BG) 



"1 



{N + G + BG) 



I I I I I I 



{N + G + BG) (G + BG) {G + BG) (N + G + BG) 



I ill 



(G + BG) (N + G + BG) (G + BG) 



(G + BG) 



The results are nearly the same as those obtained in the original 

 grey variant which is inbred, except the appearance of the constant 

 N form in F^. 



(b) Exactly the same results were obtained when we crossed 

 a normal-egged breed extracted from a cross between divoltine 

 " Chiyodzuru " and the univoltine albino before referred to with the 

 gi-ey-egged variant No. 24. The results of experiments are tabulated 

 below (Table V). 



(c) In this series we made again similar matings as in the previous 

 two series of experiments. Three females from the divoltine normal- 

 egged white called " Shinkawachi " and two from the normal-egged 

 extracted form called E III were mated with males derived from the 

 very same grey variant used in the preceding experiments. They gave 

 as in former cases, all Fi normal egg-batches, no grey ones. 



Two batches from the former and one from the latter were reared in 

 the next season. The former gave 93 F2 batches and the latter 13 F2 

 batches, all of them being normal batches. Five batches of the former 

 and one batch of the latter were again reared in the next season. The 

 former gave 968 F3 batches of normal eggs and the latter 10 ^3 normal 

 batches. 



