bk1 << Drp1 << bk2 hits nrd

No PCR product is obtained from 'D20' animals when primers mapping to the last two exons of Drp1 are used, suggesting the presence of a genetic aberration.

The Df(2L)D20 chromosome acts as a dominant weak suppressor of telomeric silencing (assayed using the effect of the chromosome on the eye colour phenotype of flies carrying "P{w^var}KR3-2", a stable "brown-red" variant of the P{3'WP-2,w^var}2Lt insertion), but this is a false positive result (the suppressor is not within the bounds of the deficient region) because the region of the deficiency is covered by one or more nonsuppressing deficiencies. In addition, the 2L TAS array on the chromosome is missing (as assayed by in situ hybridization) and it has previously been shown (FBrf0137248, FBrf0158986) that partial or complete deficiency of the 2L TAS array on the homologue suppresses silencing of brown-red variants of P{3'WP-2,w^var}2Lt.