TABLES. 



39 



Table 7. — Classification of generation 20, rninus-seUction aeritt. 



Table 8. — Classification of generation 21, minus-selection series. 



Table 9. — Classification of extracted hooded third Fj young produced by a 

 cross of plus-selected un.th wild rats. 



Note. Standard deviation oi first F2 was 0.73, that of second Fj was 0.50 (tables 

 141 and 145, Publication No. 241). 



Table 10. — Classification of extracted hooded first F2 young from a cross 



minus-selected with ivild rats. 



of 



