Bellerophon ease, with the privations suffered by the good—is apparently the basis for Aristophanes' imputation of "atheism" to the poet. The replacement of Bellerophon by the more familiar culture hero Perseus was a development of Classical times that was standardized during the Middle Ages and has been adopted by the European poets of the Renaissance and later. Bellerophon Bellerophon (; Ancient Greek: Βελλεροφῶν) or Bellerophontes () is a hero of Greek mythology. He was "the greatest hero and slayer of monsters, alongside Cadmus and Perseus, before the days of Heracles", and his greatest feat was killing the Chimera, a monster that
Chimera (genetics) give rise to the embryo proper. Embryos that are to be used in chimeras can further be genetically altered in order to specifically contribute to only one part of chimera. An example is the chimera built off of ES cells and tetraploid embryos, which are artificially made by electrofusion of two two-cell diploid embryos. The tetraploid embryo will exclusively give rise to the trophectoderm and primitive endoderm in the chimera. There are a variety of combinations that can give rise to a successful chimera mouse and — according to the goal of the experiment — an appropriate cell and embryo