Fig. 2.

Deficiency and complementation mapping of a hybrid inviability gene. The region shown corresponds to cytological region 95 of the third chromosome of D. melanogaster. Bars shown in gray below the chromosome uncover recessive hybrid inviability in D. melanogaster-D. simulans hybrids and those shown in black do not. Vertical lines represent known viability-essential complementation groups in the region. Hybrid inviability maps to a single locus, Nup96. Data are based on ref. 34. [Reproduced with permission from ref. 34 (Copyright 2003).]