The Journal Of Experimental Zoology 1944 Vol 26 Classic Reprint PDF Download

Excerpt from The Journal of Experimental Zoology, 1944, Vol. 26 The rapid development of the new science of genetics has opened up many fertile fields of investigation and it has also revived interest in the problem of inbreeding which has been dormant for many years. Charles Darwin ('75, '78) considered the subject of inbreeding so important that not only did he collect all available data regarding it, but he himself carried on a series of inbreeding experiments that extended over a period of eleven years. Darwin's experiments on plants were followed by those of Crampe ('83), of Huth ('87), and of Retzima-Bos ('93; '94) on various species of mammals. The conclusions reached by each of these investigators can well be stated in the words of Darwin ('78): "The consequences of close interbreeding carried on for too long a time, are, as is generally believed, loss of size, constitutional vigor and fertility, sometimes accompanied by a tendency to malformation." Darwin adds, furthermore: "That any evil directly follows from the closest interbreeding has been denied by many persons, but rarely by any practical breeder and never, as far as I know, by one who has largely bred animals which propagate their kind quickly." On account of the almost universal prejudice against inbreeding, or because the results of former work seemed conclusive, the problem of inbreeding was practicably ignored by scientists after the publication of Retzima-Bos' results in 1893, and only within the past decade has it again received any serious consideration. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.