HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



19 



ness attained by each. The average grades for wildness at- 

 tained by the males in the first test and in the last test are 

 almost identical with those of the females. But in the case 

 of the averages for wildness in all tests and in third, fourth, 

 and fifth tests, those of the males are a fraction of a grade higher 

 than those of the females. While the averages of the first 

 tests for savageness are somew^hat higher for the females than 

 for the males, the average grades attained in the last tests are 



■ TABLE 6 



Summary of Results for First Generation Hybrids, Fi, of Series A 



Average number tests, 

 Range of tests, 2-5 

 Average age in days : 



First 



test, 31.60 



Last test, 75.63 



41 Fia 

 Males 



Average number tests, 

 Range of tests, 3-5 

 Average age in days: 



First 



test, 30.92 



Last test, 75.59 



52Fia 

 Females 



3.82 



First test 



Average 1 and 2. . 



Average all 



(38) 



Average 3, 4 and 5 



Last test 



4.19 



First test 



Average 1 and 2. . . 



Average all 



Average 3, 4 and 5 

 Last test 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



4.0 



3.74 

 3.33 



2.94 



2.75 



3.98 



3.70 

 3.15 



2.92 



2.75 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



3.80 

 3.45 



2.98 



2.52 

 2.14 



4.11 



3.68 



2.11 



2.36 

 1.96 



16 



16 



just the reverse. The grades representing the averages of all 

 the tests are practically equal, 2.98 for the males and 2.99 for 

 the females. The males in the third, fourth and fifth tests for 

 savageness received, as an average, 0.16 grade higher than the 

 females. 



The modal grade for wildness of the males and females of 

 Fia is either 3 or 4 in each case. The mode for savageness of 

 the males ranges between 2 and 4, and of the females, between 

 1 and 4. 



