INHERITANCE OF FECUNDITY 239 



These results are suggestive in connection with the problem of 

 the absolute fecundity value of the same genes from different 

 sources, a matter which will be fully discussed later. The figures 

 give clear evidence of Mendelian segregation of high and low fecun- 

 dity. 



Mating s of Fi cf 576 with Cornish Indian Game females. There 

 were but two matings of cf 576 with pure Cornish Indian Game 9 9 

 which produced adult female offsprings. Other matings were 

 made but got no adult progeny. The successful matings were with 

 C.I.G. 9 9 of constitution fhh . Flik. The results were as 

 follows : 



cf 576 fhL, . fUh X fhU . FUh. 



9 Progeny 



Winter Productioji: Over 30 Under 30 . Zero 



Observed °. 3 1 



2 



Total observed 5 1 



Total expected 1.5 3 1.5 



Mean winter production of 9 9 



in indicated class 11 .80 eggs eggs 



The numbers here are too small to give definite results, but 

 there is nothing incompatible in the observations, having regard 

 to the smallness of the numbers, with what would be expected. 



Matings of F^ cf 577 with Barred Plymouth Rock females. There 

 were three matings of this sort, but the families were all small. 

 The females used were of class 2 (table 6) . The results were as 

 follows : 



cf 577 fhU . fliLi X fLiLo . FUh- 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



(9 1118) 1 



(9 F350) 1| U 



(9 F235) 12 



Total observed 2J . 4| 



Total expected 3.5 3.5 



Mean winter production of 9 9 



in indicated class 35.00 eggs 11 .25 eggs 



