inheritance; of fecundity in domestic Fowl,. 



363 



TABLE 2.^ 



Showing the results of mating F^ J 576 zuith F^ 2 9 

 Type of mating: fkL^ . fLJ. X fkL^ ■ FLih and (or) fLik . Fkh 



Individuals Used in These Matings 



Winter Recokd op Daughters 



c? 9 



Over 30 



Under 30 



Zero 



Total adult 

 9 progeny 



576 ' F68 • 

 576 . F89 

 576 F41 

 576 F79 

 576 F416 

 576 1 F421 

 576 F33 

 576 F415 



4 

 

 1 



1 

 

 

 5 

 



2 

 3 

 3 

 3 

 



3 



4 





 

 



1 



21 

 2 



1 



6 

 3 



4 

 5 

 2 

 4 

 10 

 5 





11 

 14.6 



42.81 eggs 



20 

 19.5 



12.05 eggs 



8 

 4.9 



eggs 



39 



Total Expected 





Mean winter production of 9 

 in indicated class 



9 









^ These two individuals ought really to be excluded on the ground of 

 physiological abnorniality of the sort discussed at the beginning of this 

 section. Neither of them made a norm.al 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 . 



Over 30 



Under^ 30 



Zero 



II 



20 



6 



139 



18.S 



4.6 



The same kind of evidence for the segregation of different 

 degrees of fecundity which has been seen in all the previous 

 matings appears again in these F- birds. 



Matings of Fi $ 577 zvith Fi females. This Fi $ 577 was 

 produced in the following way: 



C.I.G. $ 558 (fU.. fhh) X B.P.R. ? 234 (fU.. Fhh) 



/A $ S77 

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

 four (really three different) kinds as follows: 



A. fU.. fl.U C. fhh. fU.2 



B. flM 'fUL. D. fhU. fhU 



The results indicate that $ 577 was of the last (D) type, pro- 

 ducing two kinds of gametes, fhL and /A/ys. He was mated 

 with 4 barred Fi 5 5 and 4 black F^ 9 9 . All of these fe- 

 males, as in the preceding case, produced F-bearing gametes of 



6 



