Polytene chromosomes normal.
Tandem duplication within the Adh gene.
Complex duplication (cytology not discussed).
250 bp insertion formed by unequal crossover between exon 3 (at +708) and exon 2 (at +465) with 7bp (GTGCAAC) inserted at the junction.
Aaron.
Selected as: Pentenol resistant adult.
CRM negative.
Used, carried in P-element vectors along with other Adh alleles, to study gene conversion and unequal crossing over to re-generate "Adh+".