This homozygous-lethal pericentric inversion is maintained in repulsion to a c DlS chromosome. A good recombination suppressor for the second chromosome. A second chromosome balancer consisting of the above inversion in repulsion to a multiple marker chromosome that carries an uncharacterized recessive lethal. Mos Dark is an X chomosome marker with variable penetrance and expressivity. Although easily distinguished in the homozygous state, hemi- and heterozygotes are difficult to identify unequivocally.
Dieldrin resistance is semidominant.
We typically select early to mid fourth stage larvae at 1 ppm. This dose does not kill hetero- or homozygous resistant types. PEST Standard chromosome arrangement. The p allele has a pale pink color. This strain reported by several labs to be a very vigorous laboratory stock.