"Eugenics" is a catch-all for dumping on an opponent. It is like saying "poison gas" to discredit the findings of chemistry.
Even if every biologist who ever lived were a monster of depravity, evolution would still happen.
http://www.organicconsumers.org/Patent/human-animals.cfm
"But creating human-animal chimeras—named after a monster in Greek mythology that had a lion's head, goat's body, and serpent's tail—has raised troubling questions: What new subhuman combination should be produced and for what purpose? At what point would it be considered human? And what rights, if any, should it have?"