HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



33 



The explanation for the fact that the sixth test for wildness 

 of the older mice in the second groups did not follow that of 

 the younger mice in being higher in grade than the fifth test of 

 the corresponding first groups may be found in the difference 

 observed in the general type of reaction to handling as the 



TABLE 21 

 Summary of Results of Group 2, Second Generation Hybrids, Ft, of Series B,Tested Daily 



Average number tests, 5.94 



Range of tests, 5-6 First test 



Average age in days: 



First test, 35.11 Average 1 and 2 . . 

 Fifth test, 39.88 



Sixth test, 66.64 Average first 5. . . . 

 18 Fob INIales Average 3, 4 and 



and Females 5 



Fifth test 



Sixth test 



Average number tests, 5.88 



Range of tests, 5-6 First test 



Average age in days: 



First test, 35.33 Average 1 and 2 . . 



Fifth test, 40.33 



Sixth test, 66.00 Average first 5 . . . . 



9 Fab Average 3, 4 and 



Males 5 



Fifth test 



Sixth test 



Average number tests, 6 



Range of tests, 6 First test 



Average age in days: 



First test, 34.88 Average 1 and 2.. 



Fifth test, 39.44 



Sixth test, 67.22 Average first 5. . . . 



9 F2b Average 3, 4 and 



Females 5 



Fifth test 



Sixth test 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 



4.05 



3.66 



3.45 



3.31 

 3.05 

 3.35 



4.11 



3 .33 



3.06 



2.88 

 2.77 

 3.12 



4.0 

 4.0 



3.84 



3.74 

 3.33 

 3.55 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 



4.44 



4.05 



3.52 



3.16 

 2.77 

 3.82 



4.44 



3.83 



3.2 



2.77 

 2.22 

 3.0 



4.48 

 4.27 



3.55 

 3.33 

 4.55 



1 



11 



hybrids grew older. There seemed to be a lesser tendency to 

 violent reactions of either wildness or savageness with a some- 

 what more agressiveness in the latter. With age they became, 

 as it were, more deliberate in their movements. 



In order to compare more easily the results included in 

 tables 18 to 23 inclusive, the more important points of these 



