B. MiYAZAWA 9 



7. Yelloio plant with magenta flower. 

 The results are shewn in Table XI. 



TABLE XI. 



Magenta Deep magenta Scarlet Deep scarlet Totals 

 No. 39— 7 ... 64 22 22 10 118 



Expected ... 66-375 22-125 22-125 7-375 



In the above Table we see that the ratio magenta : deep magenta : 

 scarlet : deep scarlet is 9:3:3:1. Thus the genetic constitution of the 

 plant used must have been ggDDBbMm. 



8. Yellow plant with light scarlet flotuer. 

 The results are shewn in Table XII. 



TABLE XII. 



Thus the ratio light scarlet : scarlet : white is 2:1:1, so that the 

 genetic constitution of the plants used must have been ggDdbbMM. 



9. Yelloiu plants with dark-red flowers. 



As was reported in my previous paper\ I found in ^4 a family (44 — 6) 

 which, in spite of the fact that it segregates into green and yellow 

 plants, yet breeds true to dark-red flowers ; evidently there must exist 

 some special reason for this fact, and the experimental results conducted 

 on this family in F^, are as follows : 



No. 44—6- 



The above Table shews that all the families have dark-red flowers in 

 spite of their yellow leaf-colour. What then, we may ask, is the cause 

 which has led to such contradictory results ? Now let us consider in 



1 Journal of Genetics, Vol. viii. No. 1, p. 73. 



