HEREDITY OF WILDNESS AND SAVAGENESS IN MICE 



49 



A general summary of the results of the three hybrid genera- 

 tions, according to the above arrangements, is presented in 

 table 38. The first column of this table, beginning at the top, 

 gives the following values for Series A of the first hybrid genera- 

 tion: (a) number of litters, (b) total number of mice, (c) num- 

 ber of mice which were wild and savage, (d) number which were 



TABLE 35 



Summary of Results of Third Generation Hybrids , Fs, of Series B,fromMatings of Parental 

 Generation, Tame Female with Wild Male 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 44.09 

 Last test, 87.12 



11 Fsb Males 

 and Females 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 44.6 

 Last test, 86.25 



5 Fab 

 Males 



Average number tests. 

 Range of tests, 4-5 

 Average age in days: 

 First test, 43.66 

 Last test, 88.0 



6 Fab 

 Females 



4.62 



First test 



Average 1 and 2 . . 



Average all 



Average 3, 

 4 and 5 

 Last test 



4.8 _ 



First test 



Average 1 and 2. . 



Average all 



Average 3, 



4 and 5 



Last test 



4.5 _ 



First test 



Average 1 and 2 . 



Average all 



Average 3, 



4 and 5 



Last test 



Distribution of mice 

 in grades: 



Av. 



4.0 



3.77 



3.9 



4.0 



3.72 



4.0 



4.08 



4.2 

 3.8 



4.0 



3.75 



3.74 



3.73 

 3.66 



1 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 S 



5.0 

 4.5 



4.37 



4.27 

 4.5 



5.0 



4.6 



4.62 



4.64 

 4.75 



5.0 



4.41 



4.14 



3.93 

 4.25 



wild and non-savage, (e) number which were tame and savage, 

 (f) number which were tame and non-savage. Immediately 

 below this are the number for the males which in turn are fol- 

 lowed by the numbers for the females. Following these values 

 are the numbers of mice of this series which, according to the 

 foregoing classification were, respectively, wild, tame, savage. 



