inheritance; of fecundity in domestic eowe. 337 



TABLE 19 



Shoiuing the results of all matings of class 4 (^ <^ y. class 4 ? ? 

 fL,L, . fkk X fUh . PLJ2 



Number of Individ- 

 uals Involved in 

 Matings of This Type 



Winter Egg Production of Daughters 



c?<^ 



?9 



. Class - 



Over 30 



Under 30 



Zero 



Total adult $ 

 progeny 



2 



4 Observed 

 Expected 



5 

 5 



5 



5 











10 



Mean winte 

 in indicat 



r production of all 9 9 



43 . 40 eggs 



13.60 eggs 













TABLE 20 



Shoiv'mg the results of all tnatings of class 4 <^ d* X oH classes of 2 2 

 General Summary 



Number of Individ- 

 uals Involved in 

 Matings of This Type 



Winter Egg Production of Daughters 



d'd' 



99 



Class ' Over 30 Under 30 



Zero 



Total adult 9 

 progeny 



4 



43 



Observed 

 Expected 



514 



51.45 



624 



62.5 



11 



11 .05 



125 



Mean winter production 

 in indicated class. . . . 



of all 9 9 



47.94 eggs 



15.34 eggs 



eggs 





No closer agreement between observation and expectation 

 than is here shown could be expected. The results of the mat- 

 ings discussed in this section confirm completely the general con- 

 clusions reached above from an examination of the matings of 

 class 7 males. 



Matings of Barred Plymouth Rock males of class j. 



Males of this class have a gametic constitution fLiL2. fUL-.. 

 That is, they are homozygous with respect to the second, or ex- 

 cess, production factor, and heterozygous with respect to the 

 first. Two males of this type were used in the experiments. 



B.P.R. $ (55. Indicated constitution == fLd,2. fhL^ 



This male was purchased in 1908 from Mr. Wesley B. Bar- 

 ton, Dalton, Aiass. Nothing is known of his breeding so far as 



