Fitness of sis null mutants
| Genotype | Fitness | ||||
|---|---|---|---|---|---|
| Sex | sis | Sxl | Male | Female | Comments |
| Male | sis+/sis+ | SxlFS/SxlFS | 1 | Original male | |
| Female | SxlFS/SxlFSPe | 1 | Original female | ||
| Female | SxlFSPe/SxlFSPe | 1 + k | Two doses of Pe, better female | ||
| Male | sis–/sis+ | SxlFS/SxlFS | 1 | Same as original male | |
| Male | SxlFS/SxlFSPe | 1 | Pe inactive, male | ||
| Male | SxlFSPe/SxlFSPe | 1 | Pe inactive, male | ||