HEKEDITY 



other of wide striped, plus series. In eaclr 

 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 



AVERAGE NUMBER 

 GRADE, OF OFF- 

 OFFSPRING. SPRING. 



2.05 

 1.92 

 2.51 

 2.72 

 2.90 

 3.09 

 3.14 

 3.30 



150 



471 



341 



444 



610 



834 



874 



91 



3,815 



124 



4,921 



