236 



RAYMOND PEARL 



TABLE 27 



Shoiving the results of mating Fi cT 576 with Fi 9 9 



Type of mating: fUL^ . fLih X fliL2.FLih and (or) fLih . FhU 



' These two individuals ought really to be excluded on the ground of physio- 

 logical abnormality of the sort discussed at the beginning of this section. Neither 

 of them made a normal growth. No poultrymen would have regarded these birds 

 as reliable material for the study of egg production. Leaving these two birds out 

 the totals stand as follows: 



Winter Production: 



Observed 



Expected 



The same kind of evidence for the segregation of different 

 degrees of fecundity which has been seen in all the previous mat- 

 ings appears again in these F^ birds. 



Matings of Fi cf 577 with Fi females. This Fi cf 577 was pro- 

 duced in the following way: 



C.I.G. ^ 558{fL,k . fUh) X B.P.R. 9 234 {fL,U . Fl,l,) 



i 

 F, ^ 577 



Such a mating as this would be expected to produce males of 

 four (really three different) kinds as follows : 



A. fL,h . fL,U C. fU, . fL,U 



B. fUh . fliU D. fhU . fliLo 



