HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



25 



remains true with the exception of the grade for savageness of 

 the old Fia females which exceeds that of the Fia females of 

 ordinary age as shown in table 6. The results of the 48 

 F2a's of table 14 when compared with the second part of table 

 4 and with table 7 indicate that the greater age has caused a 



TABLE 14 

 Summary of Rcsidls of Tests of Old Alice of Second Generation Hybrids, Fo, of Series A 



Average number tests, 3.98 



Range of tests, 3-4 First test 



Average age in days: 

 First 



test, 85.39 Average 1 and 2 



Last test, 135.41 



Average all 



48 (old) F.a Males 



and Females Average 3, 4 and 5 . 

 Last test 



Average number tests, 4.00 



Range of tests, 4 First test 



Average age in days: 



First test, 85.19 Average 1 and 2. . . . 

 Last test, 134.88 



Average all 



26 (old) Fsa 



Males Average 3, 4 and 5 . 

 Last test 



Average number tests, 3.95 



Range of tests, 3-4 First test 



Average age in days: 

 First 



test, 85.63 Average 1 and 2. . . . 



Last test, 136.04 



Average all 



22 (old) Foa 



Females Average 3, 4 and 5 . 

 Last test 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 S 



3.79 

 3.50 



2.94 



2.38 

 2.04 



3.65 



3.17 



2.62 



2.07 

 1.69 



3.95 



3.88 



3.33 



2.76 

 2.45 



14 



12 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



3.68 



3.19 



2.43 



1.64 

 1.35 



3.65 



3.01 



2.18 



1.34 

 1.07 



3.72 



3.41 



2.73 



2.04 

 1.68 



11 



decrease in the grades of wildness and savageness of all the 

 tests. 



2. The number of tests was increased to eight, and the grades 

 of the last three tests noted. 



The individuals used in this experiment numbered 17, and 

 were of the F2a. The results are given in table 15. The 



