INHERITANCE OF FECUNDITY 



243 



If the totals are modified in accordance with the above sugges- 

 tion we get 



Winter Production Over 30 



Observed : (modified) 17^ 



Expected. 18 



Mean winter production : 60 . 00 eggs 



B. Type of mating: fL^Lo . flj, ] 



or \ X fkLo . FUh 



fL,k . fkL, ) 



While this single family is small the three classes expected are 

 represented and in as near the right proportion as could be 

 expected. 



Putting together all the results for B.P.R, d^cf X Barred Fi 9 9 

 we get: 



Unmodified Data 



Winter Production: Over 30 Under 30 Zero 



Observed 21§ 16^ 4 



Expected 20.25 21 0.75 



Data modified in accordance with physiological facts regarding individual birds 



Winter Production: Over 30 Under 30 Zero 



Observed 19| 20| 2 



Expected 20.25 21 0.75 



Matings of Barred Plymouth Rock males and Fi Black females. 

 A number of matings of this type were made, representing several 



