Sudden Origins: Fossils, Genes and the Emergence of Species - Hardcover

Schwartz, Jeffrey-H

Hardcover

ISBN 10: 0471329851 ISBN 13: 9780471329855

Verlag: Wiley, 1999

Inhaltsangabe

The field of genetics remains a little understood area of science, yet one which continues to provoke involved and often heated debate. Here, Jeffrey Schwartz introduces a recent discovery in genetics - the discovery of a new type of gene called the homeobox gene, and argues that this discovery leads to a radical new understanding of how evolution works. This gene, the author suggests, can cause dramatic and very rapid mutations in animals, leading to a spectacular increase in the rate of evolution. Conventional evolutionary theory has suggested that the process can only occur over a lengthy period of time, allowing new species to develop slowly. Such an innovative theory, therefore, is bound to cause controversy, especially when it used to provide the answer to one of the outstanding questions raised by the evolutionary process, namely, how exactly do new species emerge?

Über diesen Titel

Über die Autorin bzw. den Autor

JEFFREY H. SCHWARTZ, Ph.D., is a professor of anthropology at the University of Pittsburgh and the author of the critically acclaimed The Red Ape and What the Bones Tell Us. He is also coauthor, with Ian Tattersall, of the forthcoming landmark three-volume work The Human Fossil Record.

Von der hinteren Coverseite

The greatest riddle of evolution has been the following puzzle: while Darwin argued that new species emerge through a slow, gradual accumulation of tiny mutations, the fossil record reveals a very different scenario--the sudden emergence of whole new species, with no apparent immediate ancestors. This discrepancy has fueled heated debate among evolutionary theorists and has provided unfortunate fodder to creationists, who see it as proof that evolution doesn't happen at all.

Now, in this provocative and timely book, leading paleoanthropologist Jeffrey Schwartz presents a groundbreaking and radical new theory of evolution, which brings together evidence from genetics, paleontology, embryology, and anatomy to solve this great outstanding riddle. Central to the new theory is the recent discovery of a special kind of gene, known as homeobox genes, which can cause dramatic mutations that express themselves suddenly in the form of a new species. Such a new species will appear to have arisen out of thin air, with no lineage of ancestors. The new theory preserves natural selection, but shows that it is not the primary engine driving evolution, after all.

Writing with graceful prose and the expert knowledge only an insider can bring, Jeffrey Schwartz begins by taking readers on a fascinating journey through the whole history of evolutionary thinking and discovery, recounting the major events and disputes. He also introduces the intriguing puzzles encountered along the way in the study of human evolution and shows how, despite early alternative theories advanced by some of the greatest scientific minds of the nineteenth and twentieth centuries, gradualism became a matter of scientific orthodoxy. His account includes the stories behind such highlights as the infamous Piltdown hoax and the remarkable discovery of the astonishingly complete Lucy skeleton.

Schwartz then introduces the series of important recent discoveries in developmental biology and genetics that paved the way to his new theory, culminating with the discovery of homeobox genes. This surprisingly small set of key regulatory genes controls everything about the way an animal develops. A slight variation in one of these crucial genes can make the difference between an embryonic limb bud developing into a fin or a foot, an arm or a wing. The key insight Schwartz presents is that a dramatic mutation in one of these genes will be passed on silently, unexpressed, through generations until that mutation is carried by a large enough portion of the population that it will suddenly express itself in bodily form in a number of individuals in a short period of time, creating a new species.

Sudden Origins is a provocative and important book that will change the debate about evolution and challenge a number of popular ideas premised on the foundation of Darwinism. This book is crucial reading for anyone who has ever pondered the mysteries of our evolutionary heritage.

"In the evolutionary sciences, where we are all struggling to piece together a history that can be perceived only through the fragments of fossils or the living termini of a past that is now lost, it would be foolhardy to cling unreservedly to a particular set of models and hypotheses without at least occasionally questioning their very bases. . . .

Recent discoveries, both of fossils that muddy the presumed clear picture of human evolution and of previously unknown kinds of genes that can control whether an organism develops into a fruit fly or a mouse, serve to take us back to where the early evolutionists began: wrestling with the past through the eyes of a scientist as well as an organism that can contemplate its own existence."--from the Preface.

Details zur Ausgabe

• Verlag: Wiley
• Erscheinungsdatum: 1999
• Sprache: Englisch
• ISBN 10: 0471329851
• ISBN 13: 9780471329855
• Einband: Tapa dura
• Anzahl der Seiten: 432
• Kontakt zum Hersteller: Nicht verfügbar
• Verantwortliche Person: Nicht verfügbar