A 9.5kb genomic fragment which contains the entire Hmr gene, and portions of the flanking CG2124 and Rab9D genes.
A single autosomal copy of Hmr+t9.5 results in complete lethality of the hybrid female offspring of a cross between D. melanogaster females and D. simulans males.
Hmr+t9.5 rescues HmrEY12237
The suppression by HmrEY12237 of hybrid male lethality in the progeny of a cross between D. melanogaster females and D. simulans males is no longer seen if the female D. melanogaster parent is also carrying a copy of Hmr+t9.5.