Experiments which in previous years were made with ornamental plants have already afforded evidence that the hybrids, as a rule, are not exactly intermediate between the parental species. With some of the more striking characters, those, for instance, which relate to the form and size of the leaves, the pubescence of the several parts, etc., the intermediate, indeed, is nearly always to be seen; in other cases, however, one of the two parental characters is so preponderant that it is difficult, or quite impossible, to detect the other in the hybrid. from 4. The Forms of the Hybrid One of the most influential and important scientific works ever written, the 1865 paper Experiments in Plant Hybridisation was all but ignored in its day, and its author, Austrian priest and scientist GREGOR JOHANN MENDEL (18221884), died before seeing the dramatic long-term impact of his work, which was rediscovered at the turn of the 20th century and is now considered foundational to modern genetics. A simple, eloquent description of his 18561863 study of the inheritance of traits in pea plantsMendel analyzed 29,000 of themthis is essential reading for biology students and readers of science history. Cosimo presents this compact edition from the 1909 translation by British geneticist WILLIAM BATESON (18611926).

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...

Mendel's groundbreaking paper, which laid the foundation for further research upon heritage and genetics, is published here complete with the original illustrations and charts. When Mendel released this paper in 1865, it was after years of rigorous study and comparison in plant specimens and their offspring. His conclusion that variant traits were hereditary and could be determined, with a good degree of accuracy, through probability analysis were revolutionary in natural science at the time. Mendel's assertions regarding acquired characteristics, demonstrated through the comparison of peas and their seeds, would spark great interest in the nature and mechanisms behind heredity between generations of organisms. Seeking to gain high quality results, Mendel prefaces his explanations by noting that he artificially fertilized the plants described in the work.

Mendel's groundbreaking paper, which laid the foundation for further research upon heritage and genetics, is published here complete with the original illustrations and charts. When Mendel released this paper in 1865, it was after years of rigorous study and comparison in plant specimens and their offspring. His conclusion that variant traits were hereditary and could be determined, with a good degree of accuracy, through probability analysis were revolutionary in natural science at the time. Mendel's assertions regarding acquired characteristics, demonstrated through the comparison of peas and their seeds, would spark great interest in the nature and mechanisms behind heredity between generations of organisms. Seeking to gain high quality results, Mendel prefaces his explanations by noting that he artificially fertilized the plants described in the work.

William Bateson (1861 1926) began his academic career working on variation in animals in the light of evolutionary theory. He was inspired by the rediscovery in 1900 of the 1860s work on plant hybridisation by the Austrian monk Gregor Mendel (included here as an appendix) to pursue further experimental work in what he named 'genetics'. He realised that Mendel's results could help to solve difficult biological questions and controversies and to challenge the status quo in evolutionary studies. Annoyed by the 'apathetic' stance of his evolutionist colleagues, and incensed by a scathing critique of Mendel by the Oxford professor Raphael Weldon, Bateson incorporated an English translation of Mendel's work into this 1902 book along with a defence of Mendel's statistical experiments and the principles of heredity derived from them. His book is an impassioned appeal for scientists to adopt this 'brilliant method' which he felt could revolutionise both scholarship and industry.

One of the most influential and important scientific works ever written, the 1865 paper "Experiments in Plant Hybridisation" was all but ignored in its day, and its author, Austrian priest and scientist Gregor Johann Mendel (1822-1884), died before seeing the dramatic long-term impact of his work, which was rediscovered at the turn of the 20th century and is now considered foundational to modern genetics. A simple, eloquent description of his 1856-1863 study of the inheritance of traits in pea plants-Mendel analyzed 29,000 of them-this is essential reading for biology students and readers of science history.