Sentence examples for unable to breed from inspiring English sources
"Why do they not produce offspring, or if they do, why is it sterile, like mules and donkeys?" The team speculates that this may have been the fate of prehistoric couplings between humans and their close cousins, Neanderthals, with incompatible keys and locks ensuring that any offspring would be unable to breed.
That's right - unable to breed.
Those in the Cove are either problem crocodiles from the wild that have been relocated or supplied by a Darwin crocodile farm because they were unable to breed.
They also showed that hybridization in the polyploid complex could provide a mechanism for genetic exchange between diploid species that were otherwise unable to breed.
Furthermore, the adult was also shown to be six years old, whereas histological studies have shown P. mongoliensis was unable to breed until it reached ten years of age.
Unable to be bred in captivity, the last documented specimen died in the Hobart Zoo in 1936.
Both autopolyploid and allopolyploid plants can often reproduce normally, but may be unable to cross-breed successfully with the parent population because there is a mismatch in chromosome numbers.
Try to breed a rare breed.
Since allele frequencies can only be estimated, we are unable to conclude that any breed or line is fixed for either the A or G allele.
