Crossbreeds

Usage examples of mongrels.

On the other hand, the resemblance in mongrels and in hybrids to their respective parents, more especially in hybrids produced from nearly related species, follows according to Gartner the same laws.

Chapter VIII Hybridism Distinction between the sterility of first crosses and of hybrids -- Sterility various in degree, not universal, affected by close interbreeding, removed by domestication -- Laws governing the sterility of hybrids -- Sterility not a special endowment, but incidental on other differences -- Causes of the sterility of first crosses and of hybrids -- Parallelism between the effects of changed conditions of life and crossing -- Fertility of varieties when crossed and of their mongrel offspring not universal -- Hybrids and mongrels compared independently of their fertility -- Summary.

Lastly, the hybrids or mongrels from between all the domestic breeds of pigeons are perfectly fertile.

This greater variability of mongrels than of hybrids does not seem to me at all surprising.

Both hybrids and mongrels can be reduced to either pure parent-form, by repeated crosses in successive generations with either parent.

Consequently, sudden reversions to the perfect character of either parent would be more likely to occur with mongrels, which are descended from varieties often suddenly produced and semi-monstrous in character, than with hybrids, which are descended from species slowly and naturally produced.

Rattle-snake Reason and instinct Recapitulation, general Reciprocity of crosses Record, geological, imperfect Rengger on flies destroying cattle Resemblance to parents in mongrels and hybrids Reversion, law of inheritance Rhododendron, sterility of Richard, Prof.

The variability, however, in the successive generations of mongrels is, perhaps, greater than in hybrids.

It was unmistakable, standing out from all the other mongrels in that it gave evidence, and prominently, of at least three of its forbears.