HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



47 



2.5 and 5, are considered wild and savage. It is thus seen by 

 this arrangement that four distinct groups are possible, i.e., 

 a mouse would be found in one of the four classes, viz: wild 

 and savage (w-s), wild and non-savage (w-n), tame and sav- 

 age (t-s), tame and non-savage (t-n). Since the averages of 

 the tests of the wild parental stock were greater than 2.5 grade 



TABLE 33 



Summary of Results of Third Generation Hybrids, F3, of Series A, from Malings of Parental 

 Generation, Tame Female with Wild Male 



Average number tests, 5 

 Range of tests, 5 

 Average age in days: 

 First test, 38.0 

 Last test, 112.0 



6 Fsa Males 

 and Females 



Average number tests, 5 

 Range of tests, 5 

 Average age in days: 

 First test, 38 

 Last test, 97 



3 Fsa 

 Males 



Average number tests, 5 

 Range of tests, 5 

 Average age in days : 

 First test 38 

 Last test, 127 



3 Fsa 

 Females 



First test 



Average 1 and 2. 



Average all. . 

 Average 3, 4 



and 5 



Last test 



First test 



Average 1 and 2 



Average all . . 

 Average 3, 4 



and 5 



Last test 



Distribution of mice 

 in grades: 



First test 



Average 1 and 2. 



Average a 1 . . 

 Average 3, 4 



and 5 

 Last test . . . . 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 



3.83 

 3.41 



2.4 



1.72 

 1.66 



3.66 



3.16 



2.26 



1.66 

 2.0 



4.0 



3.66 



2.53 



1.77 

 1.33 



1 2 



2 



1 



they are classed as wild and savage, and similarly the tame 

 parental stock are tame and non-savage inasmuch as their aver- 

 ages never exceeded 2.4 grade. 



From the matings of the parental stock and of the first and 

 second hybrid generations in the general and selected breeding 

 eleven different sets are to be found. These include all the 



