Unisexual Fish: Laboratory Synthesis of a "Species"

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Science  12 Jan 1973:
Vol. 179, Issue 4069, pp. 180-181
DOI: 10.1126/science.179.4069.180


By hybridizing bisexual (gonochoristic) fishes, all-female clones have been produced that are comparable to those of a wild unisexual "species," Poeciliopsis monacha-lucida, living in northwestern Mexico. The laboratory unisexuals have consistently given birth only to female progeny for six generations.