HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



43 



case attaining, without exception, increasingly higher average 

 grades of wildness and savageness in the successive generations. 

 In this series, again, the females grade higher in wildness 

 and savageness in the first two generations while the males of 

 the third generation were both more wild and more savage 

 than the females. 



TABLE 29 



Summary of Results of Second Generation Hybrids, F2, of Series A, from Matings of Parental 

 Generation, Tame Female with Wild Male 



Average number tests, 4.39 



Range of tests, 3-5 First test 



Average age in days : 



First test, 47.78 Average 1 and 2. . . 

 Last test, 115.22 



Average all 



41 Foa IMales Average 3, 5 and 



and Females 5 



Last test 



Average number tests, 4.35 



Range of tests, 4—5 First test 



Average age in days : 



First test, 50.30 Average 1 and 2. . 



Last test, 107.25 



Average all 



20 Foa Males Average 3, 4 and 



5 



Last test 



Average number tests, 4.42 



Range of tests, 3-5 First test 



Average age in days: 



First test, 45.38 Average 1 and 2. . 



Last test, 120.45 



Average all 



21 F2a Females Average 3, 4 and 



5 



Last test 



Distribution of mice 

 in grades: 



Av. 



3.51 



3.35 



2.92 



2.57 

 2.48 



3.35 

 3.17 

 2.73 



2.36 



2.2 



3.66 



3.52 



3.10 



2.76 

 2.76 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



4.12 

 3.47 



3.21 



1.96 

 1.38 



4.2 



3.4 



2.39 



1.53 

 1.14 



4.04 



3.54 



3.97 



2.37 

 2.45 



The results of both Series A and Series B of the hybrids, 

 wild female by tame male, seem to show, as a rule, that the 

 grades attained in wildness and savageness in the first genera- 

 tion are lowered in the second generation and then, in the 

 third, raised to somewhat near that attained in the first. The 

 exceptions to this rule are the averages for all the tests for 



