10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 2 2012 (April - June) lessThan i greaterThan Drosophila immigrans lessThan /i greaterThan were examined using the air-dried technique and a salivary gland map of lessThan i greaterThan Drosophila immigrans lessThan /i greaterThan was constructed. The polytene chromosomes exhibit various ectopic associations and it is assumed that these sites of ectopic paring are the active sites of various protein targets; several identifiable landmarks on salivary chromosomes arms were recognized along with the nucleolar chromatin threads (NCTs), Nucleolar Organizer Regions (NORs) of Drosophila lessThan i greaterThan immigrans. lessThan /i greaterThan Kamla Upadhyay And B.K.Singh Ectopic pairing, Nucleolar Organizer Regions (NORs), Drosophila 88-92