Constitution of the White Leghorn Breed. 



191 



B and F, together with their complementary gametic combinations. 

 Looking at the matter in this Ught we have formed by the cross-bred 

 9 9 only the following gametes : 



CBU ' ChFi ' CBfi ' ChFI 



The mating between the Fi cf and the Fi 99 may therefore be- 

 represented as f ollow^s : 



d^ CBfl • Chfi ' CBfi • Cbfl X 

 9 CBfi • ChFi • CBfi • CbFI = 



02^2/2/2 (1), white 



C2Bbf2l2 (1), " 



C^Bhfdi (2), " 



C 2^4211 (2), " 

 C2Bhj2ii (1), barred 

 I C.SsM (1), '' 



c^cr" 



99 



' C2BhFfl2 (1), white 



C262F/72 (1), " 



C2BhFfIi(2), " 



C2h2FfIi (2), '' 



C2b2Ffi2 (1), black 

 [ C2BhFfi2 (1), barred 



The data presented above may be summarized as follows : 



In other words, among every 16 birds in F2 we may expect 12 

 whites, 3 barred and one black. The whites should be equally 



