Figure 2.
Mitotic figures from male larval neuroblasts in: (A) genome strain (141.02, susceptible), (B) line 114 (susceptible), (C) line 162 (slightly resistant), (D) line 177 (slightly resistant), (E) line 159 (resistant), and (F) XO (line 62). The arrows mark Y chromosomes and the arrowheads mark X chromosomes. Note the lack of a Y chromosome in the XO line. There are at least three Y chromosome types: the small submetacentric type of the genome strain and 159, the J-shaped Y of lines 162 and 177, and no Y chromosome as in XO (line 62).