The survivors breed back within one season".
The breed was created by the German zoologist brothers Heinz Heck and Lutz Heck in an attempt to breed back the tarpan.
Having bred fruits to the pinnacle of sweet, plump perfection, we then proceeded to breed them back into unpalatability.
Malthus argued that selfish, short-sighted people would breed themselves back into poverty.
But they can be major obstacles to scientists trying to breed rare species back into abundance with just a few potential mates.
Film-makers were a different breed back then.
Thus re-armed, the T-cells were allowed to breed before being put back into the patient from whom they had originally been taken.The modified T-cells survived in 15 of the patients, although in most of them the degree to which those cells expressed the modified genes waned.
"For me it's very important that each breed of dog take me back into the past of what they were bred to do and where they were bred to that," said the Toronto native, a veteran judge who is a psychiatrist by day.
Researchers Herman Dierick and Ralph Greenspan of The Neurosciences Institute in San Diego, California, set out to see if they could breed high levels of belligerence back into lab strains and to learn what genes might be implicated.
