HEREDITY 



other of wide striped, plus series. In each 

 generation the most extreme individuals were 

 selected as parents ; in the narrow series, those 

 with narrowest stripe ; in the wide series, those 

 with widest stripe. 



TABLE I 



Results of Selection for Modification of the Color-pattern 

 of Hooded Rats. 



Plus series. 



Minus series. 



GENERA- 

 TION. 



1 

 2 

 3 



4 

 5 

 6 



7 

 8 



AVERAGE 

 GRADE, 



PARENTS. 



2.50 

 2.51 

 2.73 

 3.09 

 3.33 

 3.51 

 3.53 

 3.65 



1.46 

 1.41 

 1.56 

 1.69 

 1.73 

 1.86 

 2.00 

 2.03 



AVERAGE NUMBER 

 GRADE, OF OFF- 

 OFFSPRING. SPRING. 



1.00 

 1.07 

 1.18 

 1.28 

 1.41 

 1.56 

 1.70 

 1.78 



55 



132 



195 



329 



701 



1252 



1544 



713 



4,921 



