562 



GENETICS IN RELATION TO AGRICULTURE 



It is difficult to present briefly all the evidence which has led Pearl 

 to advance the foregoing analysis for the data on fecundity in fowls, 

 reference must be made to the complete published results dealing with 

 these experiments. In Table LXXVIII the data are summarized and com- 

 pared with expectations, 

 TABLE LXXVI. GENETIC CONSTITUTIONS OF 

 CORNISH INDIAN GAME MALES FOR 

 FECUNDITY FACTORS 



but not in a satisfactory 

 manner, because different 

 types of matings have been 

 lumped together. It does, 

 however, show as well as 

 can be shown in so short 

 a summary, how closely 

 fecundity conforms to the 

 requirements of a Men- 



delian analysis. There can be little doubt that Pearl has laid the 

 broad foundations for a more definite knowledge of the behavior in 

 heredity of a complex character of great economic importance. The 

 practical implications of this analysis are discussed in Chapter XXXVIII. 



TABLE LXXV1I. GENETIC CONSTITUTIONS OF CORNISH INDIAN GAME FEMALES FOR 



FECUNDITY FACTORS 



TABLE LXXVIII. OBSERVED AND EXPECTED DISTRIBUTIONS OF WINTER EGG PRO- 

 DUCTION FOR ALL MATINGS IN PEARL'S EXPERIMENTS 



Winter production of daughters 



