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Author: August Weismann
Publisher:
ISBN:
Category : Genetics
Languages : en
Pages : 524
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Book Description
Author: August Weismann
Publisher:
ISBN:
Category : Genetics
Languages : en
Pages : 524
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Book Description
Author: August Weismann
Publisher:
ISBN:
Category : Genetics
Languages : en
Pages : 516
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309131863
Category : Technology & Engineering
Languages : en
Pages : 476
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Book Description
This anchor volume to the series Managing Global Genetic Resources examines the structure that underlies efforts to preserve genetic material, including the worldwide network of genetic collections; the role of biotechnology; and a host of issues that surround management and use. Among the topics explored are in situ versus ex situ conservation, management of very large collections of genetic material, problems of quarantine, the controversy over ownership or copyright of genetic material, and more.
Author: Frederick B. Churchill
Publisher: Harvard University Press
ISBN: 0674736893
Category : Biography & Autobiography
Languages : en
Pages : 723
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Book Description
August Weismann’s 1892 theory that inheritance is transmitted through eggs and sperm provided the biological mechanism for natural selection. In this full-length biography, Frederick Churchill situates Weismann in the swirling intellectual currents of his day and shows how his work paved the way for the modern synthesis of genetics and evolution.
Author: August Weismann
Publisher:
ISBN: 9783337884543
Category :
Languages : en
Pages : 504
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Book Description
Author: Sarah S. Richardson
Publisher: University of Chicago Press
ISBN: 022654480X
Category : Medical
Languages : en
Pages : 319
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Book Description
Introduction: The Maternal Imprint -- Sex Equality in Heredity -- Prenatal Culture -- Germ Plasm Hygiene -- Maternal Effects -- Race, Birth Weight, and the Biosocial Body -- Fetal Programming -- It's the Mother! -- Epilogue: Gender and Heredity in the Postgenomic Moment.
Author: AUGUST. WEISMANN
Publisher:
ISBN: 9781033075029
Category :
Languages : en
Pages : 0
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Book Description
Author: August Weismann
Publisher: Forgotten Books
ISBN: 9781330303481
Category : Science
Languages : en
Pages : 518
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Book Description
Excerpt from The Germ-Plasm: A Theory of Heredity In preparing the English edition of the present work, I have had the great advantage of being able to consult Professor Weismann personally with regard to many of the more difficult passages. Only those who have attempted to make a translation of an abstruse work from German manuscript, can appreciate the difficulties of rendering such a work into good English, and at the same time of keeping closely to the text. As the time in which the translation had to be prepared was a comparatively short one. I have been unable to revise the style as thoroughly as I could have wished, but trust that the author's meaning has been expressed with tolerable accuracy. In the case of special technical terms which have no recognised English equivalents, I have in all cases added the German word in brackets the first time they are used. For the extremely useful and untranslateable word 'Anlage,' the somewhat awkward term 'primary constituent' has been used when it refers to the concrete vital units: in other cases, it has been rendered by 'rudiment;' or, when it has a more abstract meaning, by 'predisposition.' The words 'Eigenschaft,' 'Charakter,' 'Merkmal,' and 'Qualität,' are often used synonymously by the author, and have therefore been indiscriminately translated by 'characteristic,' 'character,' 'peculiarity,' and 'quality.' I must express my thanks to Dr. G. H. Parker, of Harvard University, Cambridge, Mass., who kindly undertook a first revision of Chapters XIII. and XIV., and thereby rendered an earlier publication of the book possible; as well as to my friend and colleague Mr. Franck Arnold, for help in elucidating some of the more complicated sentences, and for many suggestions. 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.
Author: August Friedrich Leopold Weismann
Publisher:
ISBN:
Category : Heredity
Languages : en
Pages : 477
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Book Description
Author: Y. P. S. Bajaj
Publisher: Springer Science & Business Media
ISBN: 3662030969
Category : Technology & Engineering
Languages : en
Pages : 526
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Book Description
The germ plasm of numerous plant species, especially those of forest trees, some agricultural crops, and medicinal plants, is endangered and threatened with extinction. This depletion of germplasm pools and the shrinkage of naturally occurring genetic resources have caused international concern. Conventionally, the germplasm of plants is conserved through seeds, tubers, roots, corms, rhizomes, bulbs, cuttings, etc. However, the germ plasm of a number of trees and plantation crops (such as coconut, cocao, coffee, oil palm, rubber, mango, horse chestnut, etc. ) cannot be preserved since their seed are short-lived (recalcitrant). Likewise, germplasm of vegetatively propagated crops (such as potato and cassava) cannot be stored on a long term basis and has to be grown and multiplied periodically in nurseries and fields. The plants are thus exposed to unpredictable weather conditions and diseases, with the result that instances are known where entire genetic stocks are lost. Therefore, unconventional methods are being developed for the storage and international exchange of germplasm. For this purpose in vitro cultures have been employed, but they can only enable short-to medium term preservation; moreover, cell cultures upon repeated subculture undergo genetic erosion. In view of the recent developments in the in vitro induction of genetic variability through somaclonal variation, somatic hybridization, recombinant DNA technology, etc. , new methods need to be employed for the storage of desirable cultures. In this regard freeze preservation of cells in liquid nitrogen (-196 0q, like that of semen, enables long-term storage, theoretically, for an indefinite period of time.
