Constitution of the White Leghorn Breed. 



175 



In Table 10 it is shown that of 6 birds resulting from this cross 2 

 were black 9 9 and one was a barred cf . The latter developed into 

 a well barred adult bird (325 B). The pattern was clearest in wing 

 coverts, tail coverts and hackle feathers. On the primaries barring. 

 was faint but clearer on the secondaries. The general coloration was 

 slightly brownish. 



Case 3c. 



I [White Leqhorn cf X Black Minorca 9 ] cf 

 •cf -i _. I X 



Black Minorca 9 



Black Minorca 9- Nature of mating: CCBhffii X CCbbFfii, 

 (For discussion, see p. 195). 



In case the barred, cross-bred cockerel, 325 B, possessed the 

 barred character in heterozygous condition (as represented in the 

 zygotic formula CCffBhii) it is to be expected that, when mated with 

 pure Black Minorcas, one-half of his progeny would be barred. In 

 the season of 1912 this mating was made with the results presented 

 in Table 11. 



Table 11. — Showing the results obtained from the cross indicated above. 



The results of this cross demonstrate that the mating of the barred 

 cf, 325 B, with the pure-bred Black Minorca 99 gave one-half 

 barred and one-half black progeny; and that the barred and black 

 birds were about equally divided between the sexes. 



