196 



CARL G. HARTMAN AND WILLIAM F. HAMILTON 



TABLE 2 



Summary of certain sex characters offoivl in their causal relations to or independence 



of gonadial tissues. The table is to be considered purely tentative. The plus 



sign (+) signifies stimulating, the minus sign (— ) inhibiting 



CHARACTER 



AS INDICATED BY: 



£. Action of luteal cells 



cf Plumage — . 



Comb and wattles +. 

 Plumage + 



Castrated hens of all races and hen-feathered 

 male Sebrights become cf feathered^ 



Feminized ZZ has 9 comb and wattles 



3. Action of ovary not due to luteal cells 



cf Sex behavior + (ZZ only)., 

 9 Sex behavior + (ZW only) . 



cf Spurs - (ZW only) 



Feminized ZZ behaves like cf 



Castrated 9 is indifferent; hemaphrodite 



often exhibits hermaphroditic behavior; 



Sebright cf behaves only as a c?' 

 Castrated 9 has spurs, but luteal cells of 



Sebright testis does not inhibit spurs 



in d' 



4. Genetic factors 

 a. ZZ 



d' Size (and carriage ?) Body size cannot be feminized by hetero- 



sexual transplantation of ovaries or by 

 castration. 

 Behavior — in presence of either ovary or testis ! 



b. ZW 



9 Size (and carriage ?). 

 9 Behavior 



? (There are no experiments to test effect of 

 masculination) 



