INHERITANCE OE FECUNDITY IN DOMESTIC FOWE- 



307 



binations of the factors present will be formed, within the 

 bounds of any limitation which may be imposed by such phe- 

 nomena as coupling, repulsion or linkage. The limitation of 

 these possibilities in the present instance has been set forth 

 above : it consists simply in the fact that F and /,. are never 



TABLE 7 

 Constitution of Cornish Indian Game males in respect to fecinidiiy 



Class 



Zygote 



Gametes Produced. 



1 

 2 

 3 



fLih . fLih 

 fLik . f hh 

 f hh . / hk 



fLik 



fLihJhk 



flxh 



TABLE 8 



Constitution of Cornish Indian Game females in respect to fecundity 



Class 



Zygote 



Probable Winter Egg 

 /-Bearing 1 F-Bearing 1 Production 9 of 

 ((f Producing) I (.9 Producing) Indicated Zygotic 



Gametes Gametes Constitution 



1 fLih . FLxh I fUh FLik Under 30 eggs 



2 fhh.FLik f hhJLik FLdi,FUh Under 30 eggs 



3 , fLih . Fhk fLih.flih : Flih,FLih Under 30 eggs 



4 I / hh . Fhh I / hh I Fhh Zero eggs 



It will be noted that C. I. G. 9 classes 2 and 3 are gamelically identical. Both are 

 left in the table, however, since the whole table is so short that no confusion can be 

 caused, and this example may make clear to some readers the nature of the compression 

 (by omission of duplicate classes) which was praciissd in tables 5 and 6. 



borne in the same gamete. It should be said that these tables 

 do not show at a.ll the proportions in which the several gametic 

 types might be expected to occur. Further all duplicates have 

 been omitted, so that only the different possible types are shown 

 in these tables. 



It will be noted from table 6 that two classes of females (i 

 and 2) carry both Z,i and Li and hence are to be expected, on the 

 hypothesis developed, to be high layers. One class T class 5) 

 carries neither Li nor 1,^ and hence should make zero winter 

 records. It should be said that observations indicate that while 

 such class 5 birds occur with expected frequency, they usually 

 do not produce any oft'spring. A zero winter layer usually gets 

 very few chicks of any kind and almost never has any adult 

 5 progeny. 



