30 



Mr. R. H. Lock. On the Inheritance of [Oct. 1, 



following theoretical explanation, which was published as a provisional 

 hypothesis in 1904* 



I regarded m., p., and g. as each depending on the presence of the dominant 

 member of a separate pair of allelomorphs A — a, B — b, and C — c respec- 

 tively, C representing the grey character. And I further supposed that 

 A and B, though present, were unable to lead to the appearance of m. and p. 

 in the absence of C. B (p.) was totally inhibited in this way, whilst A might 

 just make its presence known by the appearance which we have described as 

 that of " ghost " maple. f 



In the accompanying diagram the combinations of the three pairs of 

 allelomorphs are set down at length, and it will be seen that, on the above 

 hypothesis, they lead to the proportion — 



m.p.g. 



m.g. 



p.g. 



9- 



w. 



27 



9 



9 



o 



O 



16 



with which the result actually obtained and given above is in very fair 

 agreement. The expectation is 71.3, 23.8, 23.8, 7.9, 42.2, and the observed 

 numbers were 82, 20, 21, 9, 37. 





ABC 



AbC 



aBC 



abC 



ABc 



Abe 



aBc 



abc 



ABC 



ABC 

 ABC 



ABC 



AbC 



ABC 

 aBC 



ABC 



abC 



ABC 

 ABc 



ABC 



1 Abe 



i 



ABC 



aBc 



ABC 



abc 



AbC 



i 



AbC 

 ABC 



AbC 

 AbC 



AbC 

 aBC 



AbC 

 abC 



AbC 

 ABc 



AbC 

 Abe 



AbC 

 aBc 



AbC 

 abc 



aBC 



aBC 

 ABC 



aBC 



AbC 



aBC 

 aBC 



aBC 



abC 



aBC 

 ABc 



! aBC 



Abe 



aBC 

 aBc 



aBC 

 abc 



abC 



abC 

 ABC 



abC 

 AbC 



abC 

 aBC 



abC 

 abC 



abC 

 ABc 



> abC 



| Abe 



abC 

 aBc 



abC 

 abc 



ABc 



ABc 

 ABC 



ABc 



AbC 



ABc 

 aBC 



ABc 



abC 



ABc 

 ABc 



! ABc 

 Abe 



ABc 

 aBc 



ABc 

 abc 



aBc 



aBc 

 ABC 



aBc 



AbC 



aBc 

 aBC 



aBc 



abC 



aBc 

 ABc 



aBc 



1 Abe 



aBc 

 aBc 



aBc 



abc 



Abe 



Abe 

 ABC 



Abe 

 AbC 



Abe 

 aBC 



Abe 

 abC 



Abe 

 ABc 



Abe 



! Abe 



Abe 

 aBc 



Abc 

 abc 



On this supposition some of the whites must contain m. in a latent (or 

 partly latent) condition — Abc ; others contain p. completely latent — aBc ; 



* ' Annals of the Koyal Botanic Gardens, Peradeniya,' vol. 2, p. 333. 



f Subsequent experiments showed that the non-appearance of the " ghost " maple did 

 not necessarily imply the absence of A. The degree of development of this faint brown 

 nigmentation on the testas of plants with white flowers seemed to depend to some extent 

 on the manner of ripening, and to vary from complete invisibility up to a fair degree of 

 brightness, and this sometimes in different seeds of the same plant. 



