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Author: Theodosius Grigorievich Dobzhansky
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: Theodosius Grigorievich Dobzhansky
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: Rodney Mauricio
Publisher: Springer Science & Business Media
ISBN: 1402038364
Category : Science
Languages : en
Pages : 207
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Book Description
An enduring controversy in evolutionary biology is the genetic basis of adaptation. Darwin emphasized "many slight differences" as the ultimate source of variation to be acted upon by natural selection. In the early 1900’s, this view was opposed by "Mendelian geneticists", who emphasized the importance of "macromutations" in evolution. The Modern Synthesis resolved this controversy, concluding that mutations in genes of very small effect were responsible for adaptive evolution. A decade ago, Allen Orr and Jerry Coyne reexamined the evidence for this neo-Darwinian view and found that both the theoretical and empirical basis for it were weak. Orr and Coyne encouraged evolutionary biologists to reexamine this neglected question: what is the genetic basis of adaptive evolution? In this volume, a new generation of biologists have taken up this challenge. Using advances in both molecular genetic and statistical techniques, evolutionary geneticists have made considerable progress in this emerging field. In this volume, a diversity of examples from plant and animal studies provides valuable information for those interested in the genetics and evolution of complex traits.
Author: Richard C. Lewontin
Publisher:
ISBN:
Category : Evolution
Languages : en
Pages : 372
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Book Description
In this volume the author surveys the many experiments using new molecular techniques that have revealed the enormous wealth of hereditary variation among individuals and have quantified the genetic changes that take place in the origin of new species. Dr. Lewontin proposes new theories to attack the problems which still confront the scientist. While a tremendous amount of variation has been revealed, a satisfactory explanation of the origin and maintenance of such variation is still lacking. It is not at all clear whether adaptive evolution makes use of the kind of genetic diversity that is now known to be so common. Populatin genetic theory, Dr. Lewontin observes, leads to conflicting conclusions about the forces operating on the variation, and it appears that current theory is inadequate to cope with the data. Noting that the interaction among genes in evolution is of primary importance in the interpretation of genetic change, he urges that theory needs to be developed which takes into account the evolution of the genome as a whole rather than the independent evolution of each gene. A book which summarizes in an unusually felicitous way the findings of the rapidly growing science of molecular evolution and points out new directions for its future.
Author: Theodosius Dobzhansky
Publisher:
ISBN:
Category : Evolution
Languages : en
Pages : 14
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Author: Rudolf A. Raff
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 436
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Author: Alfred Russel Wallace
Publisher:
ISBN:
Category : Ethnology
Languages : en
Pages : 576
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Author: Richard Levins
Publisher: Harvard University Press
ISBN: 0674255313
Category : Science
Languages : en
Pages : 322
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Book Description
Scientists act within a social context and from a philosophical perspective that is inherently political. Whether they realize it or not, scientists always choose sides. The Dialectical Biologist explores this political nature of scientific inquiry, advancing its argument within the framework of Marxist dialectic. These essays stress the concepts of continual change and codetermination between organism and environment, part and whole, structure and process, science and politics. Throughout, this book questions our accepted definitions and biases, showing the self-reflective nature of scientific activity within society.
Author: Doris R. Helms
Publisher: W. H. Freeman
ISBN: 9780716793236
Category : Science
Languages : en
Pages : 16
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Author: Rudolf A. Raff
Publisher:
ISBN: 9780608093581
Category :
Languages : en
Pages : 421
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Book Description
Author: David L. Jameson
Publisher:
ISBN:
Category : Evolution
Languages : en
Pages : 360
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Book Description
The nature of populations, races, subspecies, and species. Genetic basis of isolation. Origin of isolation - theoretical. Origin of isolation - experimental. The nature of the speciation process.
