"Interbreed" Quotes from Famous Books
 ... common and even usual, is yet a necessary consequence. That ill effects follow in a majority of cases is not to be doubted, but this is easily and sufficiently accounted for upon other grounds. In a state of nature animals of near affinities interbreed without injurious results, and it is found by experience that where domesticated animals are of a pure race, or of a distinct, well defined and pure breed, the coupling of those of near affinities is not ...
— The Principles of Breeding • S. L. Goodale
... barriers. The variations which occur in organisms are so great that they would sometimes run into abnormal structures were it not for the fact that sexual reproduction constantly tends to reduce them. In an open country where animals and plants interbreed freely, it will commonly happen that individuals with certain peculiarities will mate with others without such peculiarities, and the offspring will therefore inherit the peculiarity not in increased ...
— The Story of the Living Machine • H. W. Conn
... origin of varieties that do cross and produce fertile offspring. This leaves the evolutionists to account for one of the most difficult things in connection with this theory, namely, how did varieties of animals of the same species become cross-sterile?* [[*So that they were unable to interbreed. Only if such cross-sterility exists, could they exist thereafter as independent new species.—G.]] Several things must occur simultaneously before cross-sterility between parent and offspring could occur and become ...
— Evolution - An Investigation and a Critique • Theodore Graebner
... necessary consequence. That ill effects follow in a majority of cases is not to be doubted, but this is easily and sufficiently accounted for upon other grounds. In a state of nature animals of near affinities interbreed without injurious results, and it is found by experience that where domesticated animals are of a pure race, or of a distinct, well defined and pure breed, the coupling of those of near affinities is not so often followed by injurious effects as when they are crosses, ...
— The Principles of Breeding • S. L. Goodale
... inhabit the same locality, they keep well by themselves and only once, on the Panj-kiang plain, did we see them running together in the same herd; then it was probably because they were frightened by the car. I doubt if they ever interbreed except in ...
— Across Mongolian Plains - A Naturalist's Account of China's 'Great Northwest' • Roy Chapman Andrews |
