296 Miss M. Wheldale. The Inheritance of [Feb. 12. 



¥2 — Two of the cross-breds were selfed, the combined result giving : — 



Number. 



Magenta delila 89 



Crimson „ 34 



White 41 



Total 164 



If we assume the original parents to be : — 



yy II LL tt White 



YY ii LL tt Crimson delila, 



the cross-breds would be of one kind only : — 



Yy Ii LL tt Magenta delila 



" Eeversion " is again due to the introduction of I by the white plant. 

 From selfing the cross-bred we should obtain theoretically : — 







Ratios. 



Numbers 

 calculated. 



Numbers 

 observed. 



YIL 



YIL 



Magenta delila . . . 

 Crimson „ ... 

 White 



9 or 92 -25 



3 30 -75 



4 41 -00 



89 

 34 



41 





Totals 



16 164 -00 



164 



There is a close agreement between the theoretical and experimental 

 numbers. 



White x Crimson : — 



The crimson parent was hybrid as regards the characters L and T. Fj, as 

 would be expected, consisted of magentas and magenta delilas. (Table I.) 

 Except as regards striping, this is a case similar to white x yellow crimson- 

 striped, and the same series of types were obtained in F 2 as in the latter case. 

 As yet, sufficient numbers have not been grown to make the details complete. 



White x Yellow: — 



Both parents were breeding true. 



Fi consisted of magenta delilas only. (Table I.) 



If we represent the parents by : — 



yy II LL tt White 



YYiilltt Yellow, 



