226 



SAMRA COLI5Y TICK. 



TABLE VII. 



PI Vermilion normal 9 , A' v by' X v br' . 

 Red barred d", AT V Br' 



Fi Females. 

 X v br' 

 X V Br' 

 Red Barred 9 . 



367 



Fi Males. 

 X v br' 



Vermilion Normal cf. 

 312 



Gametes of Fi red barred 9 , A* v br'X V Br'X v Br' X V br' . 

 Gametes of Fi vermilion normal cf 1 , X v br' 



Females. 



F2 Males. 



The heterozygous vermilion barred females (F 2 above) were 

 mated to their vermilion barred brothers and gave the expected 

 ratios (Table VIII.). 



TABLE VIII. 



Gametes of > vermilion barred 9 , X v Br' X v br' . 

 Gametes of F? vermilion barred d 71 , X v Br' 



By mating vermilion narrow barred females (homozygous) 



