VII DOMINANCE 65 



recognised the difficulty of getting this variety to 

 breed true. Of a slaty blue colour itself with 

 darker hackles and with black lacing on the 



Sinensis X Stellata 



I 

 Intermediate ._■ F, 



I ^ \ " i 1 



Sinensis . Inter. Inter. Stellata F2 



Sinensis sin. Int. Int. Stell. Stellata F3 



Sinensis ■ Stellata- F4 



feathers of the breast, it always throws " wasters " 

 of two kinds, viz. blacks, and whites splashed with 

 blue. Careful breeding from the blues shows that 

 the three sorts are always produced in the same 



Blue X Blue 



, ^ . 



Black Blue X Blue White 



' I 1 1 1 



Black Black Blue Blue White White 



Black X • White 



I 

 Blue 

 (all) 



definite proportions, viz. one black, two blues, one 

 splashed white. This at once suggests that the. 

 black and the splashed white are the two homozy- 

 gous forms, and that the blues are heterozygous, i.e. 



F 



