34 T. H. MORGAN AND ELETH CATTELL 



SRB cf by LWY 9 



Fi 



LRN 9 ■= 283 

 LWY cP = 157 



The analyses follow : 



LWbYBrX — LWbYBrX 

 SRByBrX — SWbyBr 



Fi 



LWbYBrX — SRByBrX Long, red, normal. 

 LWbYBrX — SWbyBr Long, white, yellow. 



LWbyBrX — LWbYBrX — SRByBrX — SRBYBrX \ 

 Gametes SWbyBrX — SWbYBrX — LRByBrX — LRBYBrX / ^^^ 

 of Fj 



LWbyBrX — LWbYBrX — SWbyBr — SWbyBr ' Sperm 



Females Males 



LWBr 2 LWBr 1 SWBr 1 



LWY 6 LWY 3 S^YY 3 



' LRB 2 LRB 1 SRB 1 



LRN 6 LRN 3 SRN 3 



There were 20 cases of crossing-over counting both males and 

 females in a total of 662, or 1 to 33. It is legitimate to count 

 both sexes here because both males and females lack the 



