INHERITANCE OF FECUNDITY IN DOMESTIC FOWI,. 315 



All 2 Progeny 



Winter Production: Over so Under 30 Zero 



Observed 25 9 o 



Expected 26.3 7-5 o 



Mean winter production S0.48 eggs 13.56 eggs 



The agreement between observation and expectation here is 

 as close as could be expected considering the numbers involved. 

 Further it is evident from the mean production of the d lUghters 

 falling in the several classes that the 'Over 30' and 'Under 30' 

 classes are perfectly distinct in respect to degree of fecundity. 

 The 'Over 30' birds produced on the average, nearly four times 

 as many eggs in the winter period as the 'Under 30' birds. 



B.P.R. $ 5(57. Indicated gametic constitution ^ fhL'^. fUL^. 



This male was used in the breeding season of 19 10 and sired 

 a fairly large number of chicks of which the adult daughters 

 appear below. He was hatched in the spring of 1909. 



Matings: A. With S ? ? indicated to be of class i = fLJ.n. Fhh. 



5 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 72 92 o 



Expected 8.5 8.5 



Mean winter production of $ 5 



in indicated class 57-8 eggs 14.78 eggs 



B. With 3 ? ? indicated to be of class 2 = fL.L.. Pkk. 



5 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 12 2 



Expected 14 o 



Mean winter production of 5 ? 

 in indicated class 55-83 eggs 22.00 eggs 



C. With 2 ? ? indicated to be of class 6 z= fkU. FU,. 



? Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed li 3J o 



Expected 5 o 



Mean winter production of $ 5 



in indicated class 48. co eggs 14.00 eggs 



3 



