ELIMINATION OF SEX CHROMOSOMES 489 
producing egg is formed by the union of the two small 2’s that 
leave their larger partners at this time and fuse in order that 
‘reduction’ may occur. For, should this happen in the male- 
producing egg in order to insure the separation of the two small 
eee ANTS 
24 25 
26 
ne ROM 28 
27 
zx’s one might anticipate a similar change in the sexual egg. We 
must. conclude, therefore, that one of the pairs in the sexual 
egg represents the fusion of the two large X’s and their attached 
small 2’s. One large X and one small x would therefore be left 
