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Item Details
Title: VERSUCHE UBER PFLANZENHYBRIDEN
By: Gregor Mendel
Format: Paperback

List price: £64.99


We currently do not stock this item, please contact the publisher directly for further information.

ISBN 10: 3528091061
ISBN 13: 9783528091064
Publisher: SPRINGER FACHMEDIEN WIESBADEN
Pub. date: 1 January, 1970
Edition: 1970 ed.
Series: Ostwalds Klassiker Der Exakten Wissenschaften
Synopsis: Das historische Buch konnen zahlreiche Rechtschreibfehler, fehlende Texte, Bilder, oder einen Index. Kaufer konnen eine kostenlose gescannte Kopie des Originals (ohne Tippfehler) durch den Verlag. Nicht dargestellt. 1901 Auszug: ... 60 runde gelbe und kantige gelbe Samen.. AaB 138 runde gelbe und grune, kantige gelbe und grune Samen Aa Bb Von den kantigen gelben Samen kamen 96 Pflanzen zur Fruchtbildung, wovon 28 nur kantige gelbe Samen hatten.... aB 68 kantige, gelbe und grune Samen.... aBb Von 108 runden grunen Samen brachten 102 Pflanzen Fruchte, davon hatten: 35 nur runde grune Samen Ab 67 runde und kantige grune Samen.... Aab Die kantigen grunen Samen gaben 30 Pflanzen mit durchaus gleichen Samen; sie blieben constant.... ab Die Nachkommen der Hybriden erscheinen demnach unter 9 verschiedenen Formen und zum Theile in sehr ungleicher Anzahl. Man erhalt, wenn dieselben zusammengestellt und geordnet werden: 38 Pflanzen mit der Bezeichnung AB Sammtliche Formen lassen sich in drei wesentlich verschiedene Abtheilungen bringen. Die erste umfasst jene mit der Bezeichnung AB, Ab, aB, ab; sie besitzen nur constante Merkmale und anderu sich in den nachsten Generationen nicht mehr. Jede dieser Formen ist durchschnittlich 33 Mal vertreten. Die zweite Gruppe enthalt die Formen ABb, aBb, AaB, Aab; diese sind in einem Merkmale constant, in dem anderen hybrid, und variiren in der nachsten Generation nur hinsichtlich des hybriden Merkmales. Jede davon erscheint im Durchschnitte 65 Mal. Die Form AaBb kommt 138 Mal vor, ist in beiden Merkmalen hybrid, und verhalt sich genau so, wie die Hybride, von der sie abstammt. Vergleicht man die Anzahl, in welcher die Formen dieser Abtheilungen vorkommen, so sind die Durchschnittsverhaltnisse 1:2:4 nicht zu verkennen. Die Zahlen 33, 65, 138 geben ganz gunstige Annaherungswerthe an die Verhaltnisszahlen 33, 66, 132. Die Entwicklungsreihe be...
Illustrations: black & white illustrations, bibliography
Publication: Germany
Imprint: Springer Vieweg
Returns: Returnable
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