B. MiYAZAWA 



77 



that the hoarinoss due to H and K is only manifested when C and R 

 are both present Hence an albino (as regardH anthocyanin) nmy contain 

 both H and K, and nmy y^'t Ih» glahroiiH Ix^oaust* it ainnnt contain at 

 the saine time both C and R. An anthocyanin form, on the other hand, 

 which is glabrous, carries of course C and R, but C4in only conUiin either 

 H or K, and not Ixith ; when it carries C and R, <ih well an H an<l K, it 

 is hoary and colon reil. 



The relationship existing between the factor for leaf-colour and that 

 for flower-colour in our Cotivnlvulus is very similar to the last nH*ntion(*<l 

 case in Stocks. The fact that the dark-red colour apj)ears excluHively 

 in flowers of green plants will hi} explained in like manner as in the casi* 

 of Stocks. If we denote for example the fivctor for green leaf-colour by 

 G and that for dark-red flower-colour by D, then the jwirents would Iw 



A =ggdd, 



^ = GGDD. 



The Fi hybrid is thus GgDd, so that it is heterozygous for the 

 factor G. We will suppose that D can produce red colour but not dark- 

 red, when G is either heterozygous or absent in the zygote. 



We should have in F., the following plants : 



Colour 



That the theoretical expectation just mentioned is well fulfilled, may 

 be seen from Table II (p. 63), Table VI (p. 66), and Table V (p. 65). 



