6 



C. B. DAVENPORT 



Table 3 gives the various matings and the proportions to be ex- 

 pected. On account of the facts that (a) pigment develops 

 slowly and most of the offspring had to be described early and 

 (b) that more than one factor may be involved in the production 

 of pigment, the relation of actual to expected was not always very 

 close. 



TABLE 3 



Gametes 



Fi (Silky c? X Leghorn cf) X Fi (Silky d" X Leghorn 9 ) 



li 



In both sexes, approx- 

 matelyhalf have and 

 half lack the mela- 

 nogenetic inhibitor 



Fi (Leghorn d" X Silky 9 ) X Fi (Leghorn d X Silky 9 ) 



fT T 



Gametes 



No fully pigmented 

 male birds expected 

 (though some 

 found) as young; 

 and 9 9 half pig- 

 mented, half unijig- 

 mented 



