SEX-LIMITED INHERITANCE IN POULTRY 



9 



6. The Black-red Game Bantam has the same color as the 

 Brown Leghorn. Hagedoorn ('09) crossed it with a Brown-red 

 Game, which differs from the Leghorn chiefly in that, in the male, 

 the black breast feathers are laced with brown and the females 

 are all black except for the brown lacing of the nest feathers. 

 But a more important difference is seen in the chicks ; for in the 

 Black-red Game the chicks are striped while in the Brown-red 

 Game they are black in both sexes. Striping, S, is dominant 

 over its absence, s (table 5). 



As a matter of fact Hagedoorn did not get the expected result 

 in mating 3, which may be due to the fact that he had too few 

 offspring. He states that all young females were like the mothers 

 and all males tested were heterozygous like the father. 



7. When Brown Leghorn is crossed with White Plymouth Rock 

 there is an apparently more complicated sex-limited inheritance, 

 since the Wliite Rock carries the barring factor, B, but lacks the 

 color factor, C (Goodale, '10). Calling L the factor that deter- 

 mines the Brown Leghorn coloration and I its absence; C the 

 color-factor (which is not sex-limited) and c its absence, the 



TABLE 5 



