THE ORIGIN OF GYNANDROMORPHS. 



63 



to male parts, which, because of the lateness of the occurrence, or from shift- 

 ing of nuclei, constituted but a small part of the gynandromorph. 



Zygole. 

 V 



Left side. 



Right side. 

 V f 



-x 

 .x 



B 



B 



No. 2349. November 3, 1915. C. B. Bridges. Text-figure 52 (drawing). 



Parentage. The mother was from a strain of high non-disjunction, but was 

 known to be XX and not XXY. One X carried the genes for vermilion and 

 forked, the other X the gene for bar. The father was a vermilion forked 

 male. 



Description. The gynandromorph was largely male. The female parts 

 included the left legs, which were without a sex-comb and had forked bristles. 

 The female parts throughout had forked bristles and could therefore be 

 readily traced. All three left legs were forked and female to the mid-ventral 

 line. A very narrow strip of female tissue ran diagonally forward from above 



TEXT-FIGUHE 52. 



TEXT-FIGURE 53. 



the middle left leg to the shoulder, being chiefly marked by one large forked 

 bristle and several smaller ones. Most of the left side of the head bore forked 

 bristles, including the left antenna, the dorsal region to the left of the line 

 in the diagram, a small zone of tissue around the eye to the rear, and the region 

 below the eye including the oral bristles. The left eye was red (not vermilion) 

 and round (not bar or heterozygous bar the small nick seen in the drawing 

 of the eye seems to be an artifact) . The abdomen was male type, the genitalia 



