Yet the zebu and the Indian buffalo, living constantly side by side in the plains of India, never interbreed at all.
Moreover, species which differ only in colour seem usually tointerbreed in those parts where they meet.
Darwin tacitly assumes, in the illustration he gives, that the various races of the carnivorous animal are in some way prevented from intercrossing; for if they interbreed indiscriminately, these races will tend to be obliterated.
In all places where two of the so-called species meet they appear to interbreed, and so freely do they interbreed that at the points where the allied species run into one another it is not possible to refer the bulbuls to either species.
Their modifiability and the readiness with which they interbreed are two of the determining causes of their selection for domestication.
In the Falkland Islands the differently coloured herds of cattle, all descended from the same stock, keep separate, and interbreed with each other, but not with individuals outside their own colour-caste.
The forms that interbreed have a distinguishing colour.
The wolf in its wild state is particularly partial to dog as an article of diet, yet in confinement it will attach itself to its domesticated canine companions, and interbreed with them.
This species will, however, interbreed with the domestic cat.
The period of gestation (sixty-three days) is the same in both animals, and they will interbreed freely, the progeny being also fertile.
All mankind can interbreed freely, can learn to understand the same speech, can adapt itself to co-operation.
Unlike most savage conquerors, who take the women of the defeated side for their own and interbreedwith them, it would seem that the true men would have nothing to do with the Neanderthal race, women or men.
Essentially it was based upon species compatibility--on the concept that like can interbreed with like.
Before a variety can become permanent, it must be either separated from the others or have acquired some disinclination or inability to interbreed with them.
As long as varieties interbreed together and with the parent form, it does not seem possible that a new species could be formed by natural selection, excepting in cases of geographical isolation.
How long did they interbreed before the gap became too wide?
Dogs do not become cats, nor interbreed to produce another species.
Obviously there was no contact throughout the ages before space travel--and yet each planetary race caninterbreed with a minimum of ten others!
They come over to the East Coast in hordes in the autumn, mostly from Russia, where they also interbreed with the carrion crow.
In pre-Mendelian times all that was known was that some forms could freely interbreedwithout diminution of fertility in the product, while others could not.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "interbreed" in a variety of sentences. We hope that you will now be able to make sentences using this word.
