"Not all of any human stock have blue eyes; they're recessive."

Their genetic engineering had been limited and they could scarcely be told from original human stock.

Huge in stature, they are a twisted blend of animal and human stock.

They were savages, but still they had come from human stock.

"Lord, have you no improvement of the human stock in mind?"

It had occurred to him that the local population might be a variation on human stock incompatible with his own.

Was the computer, in fact, capable of cold genocide against any race that had not sprung from human stock?

Most people believe that all the planets were colonized by a common human stock, a few million years ago.

My fellow Avalonians who are of human stock have come to think likewise.

They were, however, of human stock, and of a type adapted for life upon a satellite.