172 



Bulletin No. 155—1913. 



Table 7. — Showing the results obtained in F2 from the mating of White Leg- 

 horn X Black Spanish cross-breds (1912 series). 



Table 8. — Combined results from Tables 6 and 7. 



We thus observe from the results presented in Tables 6, 7 and 8 

 that barred birds made their appearance in the F2 generation of the 

 W. L. X B. S. cross. The fairly wide departure from the expected 

 ratios will be discussed on a later page. 



Case 3. — White Leghorn d^ X Black Minorca 9 . Nature of 

 mating: CCBBffll X CCbbFfii. (For discussion, see p. 186). 



