MUTATIONS IN EYE-COLOR OF DROSOPHILA 



345 



vPoCXvPoCX 

 vPoCX VPoCX 



Females. 



Pure pink 



Eosin 



VpoCXvPoCX Eosin 



VpoCXVPoCX Eosin 



VPOCXvPoCX Red 



VPOCX VPoCX Red 



VPoCXvPoCX Eosin 



VPoCX VPoCX Eosin 



vpOCXvPoCX Pink 



vpOCX VPoCX Red 



t>poCXt>PoCX 

 vpoCX VPoCX 

 VpOCXvPoCX Red 



Pure pink 

 Eosin 



VpOCX VPoCX 

 vPOCXvPoCX 



Red 



Pink 



vPOCX VPoCX Red 



Mai*. 



vPoCXvpoc Pure pink 



t>PoC X V>c Eosin 



VpoCXvpoc Pure vermilion 



FpoCATpoc Pure vermilion 



VPOCXvpoc Red 



FPOCXTpoc Red 



VPoCXvpoc Eosin 



mCATpoe Eosin 



vpOCXvpoc Orange 



vpOCX Vpoc Vermilion 



vpoCXvpoc Pure C 



vpoCXVpoc Pure vermilion 



VpOCXvpoc Vermilion 



VpOCX Vpoc Vermilion 



vPOCXvpoc Pink 



vPOCXVpoc Red 



Summary of F 2 



Females. 



6 Red 

 6 Eosin 

 2 Pink 

 2 Pure pink 



Males. 



3 Bed 



3 Eosin 



3 Vermilion 



3 Pure vermilion 



1 Pink 



1 Pure pink 



1 Orange 



1 PureC 



The expectation shows that one class out of the thirty-two classes should con - 

 tain males with the formula vpoCXvpoc. The other classes contain flies of known 

 eye color, except pure pink females (vPoCXvPoCX) and pure pink males (vPoCX- 

 vpoc), and pure vermilion males (VpoCXvpoc). In fact a number of males 

 (and a few females) were produced with a faint tinge to the eye, Plate XXVI II, 

 fig. 5. So faint is this tinge in some of the classes that some of the flies would 

 be passed over as whites, but a careful comparison with known white* shows 

 that a faint color is actually present. It is best seen if the flies are kept several 

 days after emerging. 



It has been a difficult matter to refer all of these flies to their proper classes, 

 and the full account of this new series of eye-colors, that contain V or P without 



0, will be left for another time 

 fication of the vpoC 



Here we are only concerned with the identi 



The faintest class of males was picked out and mated to orange femal 



these males were C males they should produce only orange flies in this 

 Thus: 



vpOCX vpOCX Orange 9 



If 



poCX 



vpoc 



vpOCX 



ipoCX 



pOCX vpoc 



CX c? 

 Orange 9 

 Orange c? 



i 



1 f *? ^ e ^ rst ** me we ^ iave produced an orange 9 heterozygous for but homozygous for C. Aa 

 expected it is distinguishable from the form homozygous for both C and (regular stock) by being lighter 

 and yellower. It is slightly darker than the form which is heterozygous for both C and 0. Thus while 



in duplex. 



eosin C in simplex and in duplex are distinguishable, in this form in simplex is distinguishable 



• )M 



* 



