Bivariate plot generated from TaqMan genotyping, given as output from the ABI Prism 7900HT Sequence Detection System (proprietary hardware and software from Applied Biosystems). Samples are from wild caught An. gambiae s.l. adults from western Kenya. Red dots are An. gambiae s.s., blue dots are An. arabiensis, green dots are hybrids (two samples) or plasmid controls (three samples), black x's are undetermined samples, and black squares are internal negative controls.