An intriguing photograph of a dog sporting two distinct colors of markings has set off speculation that it might be an extremely rare genetic mutation known as a chimera.
A chimera is an animal made from two different species and in Bull the dog\’s case that is suspected to be a black Labrador and a yellow Labrador.
Err, no. A chimera is an animal of a blend of two different sets of genes. The easiest way to think of it is as a Siamese twin that is just the one person. There\’s a spectrum therefore, from chimera through to non-identical twins.
Plus, of course, black and yellow labs are not different species, they\’re different breeds of the same species.
Chimeras are rare but not that rare. Reasonably (for some meaning of reasonably) common in cats and there\’s certainly been recorded cases of human beings.