I\Hi;i!lTAXC]' or" FliCUNDITY IN DOMESTIC FOWI,. 35I 



tween observation an:l expectation on a gametic basis is really 

 perfect for mating A. Taken as a whole the facts speak for 

 themselves. The contrast with the results of Barred Rock mat- 

 ings is striking. 



Matings of a Cornish Indian Game male of class j (fable /). 

 Male no. 578 was hatched in 1909 and used in the breeding 

 pens the following year. His breeding record shows that he 

 was homozygous with respect to the absence of both fecundity 

 factors, having the constitution fhh. fhh. He then belongs to 

 class 3 of table 7. His breeding record is as follows : 



Matings: A. With 4 ? $ indicated to be of classes 2 or 3 =. fhh . FLiU 

 or fUh FlU 



5> Progeny 



Winter Prodiiciioii: Over _^o Under 30 Zero 



Observed i 9 8 



Expected p 9 



Mean winter production of all 



? 2 in indicated classes .... 39.00 eggs 13. 11 eggs o eggs 



B. With I 5 indicated to be of class 4 = flj... Fl^L 



9 Progeny 



Winter Production: Over 30 Undergo' Zero 



Observed o 4 



Expected o .-/ 



Mean winter egg production of 



all ? ? in indicated class eggs 



All ^ Progeny 



Winter Production : Over 30 Undergo Zero 



Observed i 9 12 



. Expected 9 /j 



Mean winter production 30.00 eggs 13. it eggs eggs 



Here again as in the previous case the single 'Over 30' record 

 is a somatic fluctuation, without gametic significance. Leaving 

 this out of account, or rather putting it in the 'Under 30' class 

 where it belongs, the agreement between observation and ex- 

 ])cctatinii is very close. 



