,n] 



Nature of Dominance 



51 



plete dominant. Males raised as F^ between the two pure 

 breeds are in their ad nit plumage almost intermediate, but 

 the F^ hens are indistinguishable from the pure Brown-red 

 hens. 



A B 



Fig. II. Two newly-hatched chickens in F^ generation from the cross 

 Brown-red Game Bantam x Black-red. A is the Black-red type 

 having dark stripes on a light ground. B is the Brown-red (or 

 "Brown-breasted") type, a dark, almost unicolorous, blackish brown. 

 A is the recessive and B is the dominant. The whole F. family 

 consisted of 58 like B and 18 like A. 



As an example in which the heterozygotes are Inter- 

 mediate the inheritance of colour in the Andalusian fowl 

 may be taken. Andaluslans are in general colour what 

 fanciers call blue — namely a diluted black. In the cocks 

 the hackles and saddle-feathers are full black, and the 

 feathers of the breast are edged or '' laced" with black. 

 The hens are blue, laced with black more or less, all over. 

 This breed is recognized by the fanciers as never breeding 

 true to colour. When blue is bred with blue three colours 

 are produced, blacks, blues, and a peculiar white* splashed 

 with grey. Experimenting with this breed we have found 



* These splashed whites are quite distinct from actual whites. They 

 are in reality coloured birds as regards composition, and their down-colour 

 is a faint bluish, very like that of the White Rosecomb bantam. 



4—2 



