Fig. 5. The meiotic arrest phenotype. A. DAPI labelling is strong in the cells at
the apex (arrow) and in Df(2R)achi1 homozygotes
this zone is expanded (B). (C-F) Anti-histone labelling. In the wild type (C)
and in mia homozygotes (F) there is a small population of early
primary spermatocytes (arrow in C) and this population is markedly expanded in
Df(2R)achi1 (D; arrow) and aly
homozygotes (E).