The cytology on Dp(2;2)M(2)m+ was never done in my lab and
I don't know that anyone else has ever done it. Genetically it
appears to be fairly large since it rescues dominant Fs alleles of
dl (Fs7606 = dl7) at 36C and a dominant Fs allele of l(2)37Cc which
is also a recessive lethal allele at the locus = l(2)37Cc13 at 37C.
We picked the duplication up accidently when it rescued the Minute
phenotype of one of our deficiencies that deletes the Minute in the
36F region. Subsequently we used it in numerous stocks that delete
this Minute to enhance the viability of the stocks. It also rescues
Df(2L)M36F-S6 and Df(2L)M36F-S5. There is no information on the size
of the duplication nor its location on the CyO chromosome. I hope
someone feels like doing the cytology and lets me know the details.