126 



The Journal ot" Heredity 



Table I. Malings in Which 1:1 Ratios Arc Expscled 



Leghorns. From the mating in which 

 a Silk\' male was used, 22 normally 

 feathered birds resulted and ironi the 

 reciprocal 28, making a total of 50. 

 This again shows the recessive nature of 

 silkiness to normal plumage. 



In the summer of 1919 various 

 crosses were made of these F/s ,vith 

 Fi's and F2's from the sporadic-silk\- 

 Leghf)rn cross. The results of such 

 malings are gi\en in Tallies I and II. 

 Table 1 shows those malings in wliicli 



equal numbers of normally and silk}- 

 feathered birds were e.xpecterl, pro- 

 \iding the silkiness of these two types 

 of fowls is the same. Reference to 

 column 2 (Table I) shows various com- 

 binations of extracted Fj silkies from 

 lA, mated to F^i's from purebred 

 silkies by Leghorns, and purebred 

 .Silkies mated to normal F, intli\iduais 

 resulting from the sporadic silk\- Leg- 

 horn cross. An excess of normally 

 l)Iumaged birrls is obtained in all 



