Biol Psych 7:23-29 Murphree OD, Newton JEO (1971) Crossbreeding and special handling of genetically nervous dogs. Cond Reflex 6:129 Nusslein-Volhard C, Wieschaus E (1980) Mutations affecting segment number and polarity in Drosophila. Nature 287: 795-801 Ostrander EA, Mapa F, Yee M, Rine ...