hybrid embryo

noun2

1. •
   An embryo resulting from the sperm of one species fertilising the egg of another.

   • True hybrid embryos are the result of fertilising an egg with the sperm of another closely related species; for example, a mule is the hybrid offspring of a donkey and a horse. — 2008
2. •
   Specifically, an embryo created artificially which combines human and animal DNA, in various proportions, for the purposes of medical research.