wapl << bk1 << pn << gt << bk2 << per
Limits of break 1 from polytene analysis (citation unavailable) Limits of break 2 from polytene analysis (FBrf0034407)
Heterozygotes are viable and exhibit a pn phenotype. Homozygotes are lethal.
Associated with: Df(1)br25.
The chromosome containing Df(1)pn7a and Df(1)br25 is referred to as "pn7".