340 



Morgan. 



The analysis follows: 



Gametes of Fj 



crMX — crMX = Miii. white 9 

 CRmX — crm = Rud. Red ^ 



crMXCRmX 



crMXcrm 



= Long Red 9 

 = Min. white (J 



cRiMX — crMX - 



CRMX — CrMX- 



crMX- 



CRmX — crmX 



- cRmX — CrmX 



- crm Sperm 



Females. 



cRJNIXcrMX = Long white 

 CRMXcrMX = „ red 

 crMXcrMX = Min. white 

 CrMXcrMX = ,. red 

 CRmXcrMX = Long red 

 cRmXcrMX = ,, white 

 crmXcrMX = Min. white 

 CrmXcrMX = „ red 



Males. 



cRMXcrm = Long white 

 CRMXcrm = „ red 

 crMXcrm = Min. white 

 CrMXcrm = „ red 

 CRmXcrm = Rud. red 

 cRmXcrm = „ white 

 crmXcrm = Rud.-min. white 

 CrmXcrm = „ „ red 



Comparing the numerical data with the expectation the following 

 relations will be observed: — (i) The long red females are about 4.5 

 times as numerous as the long-winged males, while long-winged white 

 females are 7.8 times as numerous as the corresponding males. The 

 long red females are made up of two classes, one of them an original 

 couple; the long red males come from one cross-over gamete. The 

 long white females come also from two combinations, while the long 

 white males come from a more difficult cross-over. (2) The excess 

 of the long red females over the long white females is due not only 

 to the lower viability of the white but also to the fact, illustrated 

 above, that one of the two classes comes from an original coupling. 

 (3) The miniature red males and females are 377 to 478. One of 

 the two combinations in the female comes from the cross-over, and 

 similarly for the males. On the other hand, one of the miniature 



