Constitution of the White Leghorn Breed. 



167 



feathers on the back, but became a pure white bird; 202 G 

 showed many black-splashed feathers on back and wings; 

 211 B showed a very small amount of black ticking; 211 K 

 was a pure white bird; 211 V showed a small amount of black 

 ticking. 



Table 3. — Showing the results obtained in F2 from the mating of White 

 Leghorn X Black Hamburg cross-breds (1911 series). 



The data presented in Table 3 show that the F2 generation of W. L. 

 X B. H. cross-breds is composed of black, white, gray and barred 

 birds. If the gray, black and barred be considered together as 

 "dark" individuals, it is then apparent that this group represents 

 about one-fourth of the total number of fowls, while the group of 

 white birds represents about three-fourths. This result is what we 

 should expect in case of a pair of allelomorphic characters. It is 

 evident that the white birds, although all appearing alike, include 

 two sorts, — pure dominants (white), and birds that are heterozygous 

 for black (usually flecked) . 



In 1912, another Fi d", 8 L, was mated with 12 Fi 99. Both cT" 

 and 99 resembled closely those used in the 1911 series of matings. 



