Biological Emergences: Evolution by Natural Experiment
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Chromosomal Evolution in Raphicerus Antelope Suggests Divergent X
www.nature.com/scientificreports OPEN Chromosomal evolution in Raphicerus antelope suggests divergent X chromosomes may drive speciation through females, rather than males, contrary to Haldane’s rule Terence J. Robinson1*, Halina Cernohorska2, Svatava Kubickova2, Miluse Vozdova2, Petra Musilova2 & Aurora Ruiz‑Herrera3,4 Chromosome structural change has long been considered important in the evolution of post‑zygotic reproductive isolation. The premise that karyotypic variation can serve as a possible barrier to gene fow is founded on the expectation that heterozygotes for structurally distinct chromosomal forms would be partially sterile (negatively heterotic) or show reduced recombination. We report the outcome of a detailed comparative molecular cytogenetic study of three antelope species, genus Raphicerus, that have undergone a rapid radiation. The species are largely conserved with respect to their euchromatic regions but the X chromosomes, in marked contrast, show distinct patterns of heterochromatic amplifcation and localization of repeats that have occurred independently in each lineage. We argue a novel hypothesis that postulates that the expansion of heterochromatic blocks in the homogametic sex can, with certain conditions, contribute to post‑ zygotic isolation. i.e., female hybrid incompatibility, the converse of Haldane’s rule. This is based on the expectation that hybrids incur a selective disadvantage due to impaired meiosis resulting from the meiotic checkpoint network’s surveillance of the asymmetric expansions of heterochromatic blocks in the homogametic sex. Asynapsis of these heterochromatic regions would result in meiotic silencing of unsynapsed chromatin and, if this persists, germline apoptosis and female infertility. Te chromosomal speciation theory 1,2 also referred to as the “Hybrid dysfunction model”3, has been one of the most intriguing questions in biology for decades. -
Gabriel Dover)
Dear Mr Darwin (Gabriel Dover) Home | Intro | About | Feedback | Prev | Next | Search Steele: Lamarck's Was Signature Darwin Wrong? Molecular Drive: the Third Force in evolution Geneticist Gabriel Dover claims that there is a third force in evolution: 'Molecular Drive' beside natural selection and neutral drift. Molecular drive is operationally distinct from natural selection and neutral drift. According to Dover it explains biological phenomena, such as the 700 copies of a ribosomal RNA gene and the origin of the 173 legs of the centipede, which natural selection and neutral drift alone cannot explain. by Gert Korthof version 1.3 24 Mar 2001 Were Darwin and Mendel both wrong? Molecular Drive is, according to Dover, an important factor in evolution, because it shapes the genomes and forms of organisms. Therefore Neo-Darwinism is incomplete without Molecular Drive. It is no wonder that the spread of novel genes was ascribed to natural selection, because it was the only known process that could promote the spread of novel genes. Dover doesn't reject the existence of natural selection but points out cases where natural selection clearly fails as a mechanism. Molecular drive is a non-Darwinian mechanism because it is independent of selection. We certainly need forces in evolution, since natural selection itself is not a force. It is the passive outcome of other processes. It is not an active process, notwithstanding its name. Natural selection as an explanation is too powerful for its own good. Molecular drive is non-Mendelian because some DNA segments are multiplied disproportional. In Mendelian genetics genes are present in just two copies (one on the maternal and one on the paternal chromosome). -
Taylor & Francis Not for Distribution
Template: Royal A, Font: , Date: 11/07/2011; 3B2 version: 9.1.406/W Unicode (May 24 2007) (APS_OT) Dir: //integrafs1/kcg/2-Pagination/TandF/RCRS/ApplicationFiles/9780415492447.3d 3URRI (iii) Complexity, emergence, and eliminativism 7D\ORU )UDQFLV 1RWIRUGLVWULEXWLRQ 3URRI Template: Royal A, Font: , Date: 11/07/2011; 3B2 version: 9.1.406/W Unicode (May 24 2007) (APS_OT) Dir: //integrafs1/kcg/2-Pagination/TandF/RCRS/ApplicationFiles/9780415492447.3d 3URRI 7D\ORU )UDQFLV 1RWIRUGLVWULEXWLRQ 3URRI Template: Royal A, Font: , Date: 11/07/2011; 3B2 version: 9.1.406/W Unicode (May 24 2007) (APS_OT) Dir: //integrafs1/kcg/2-Pagination/TandF/RCRS/ApplicationFiles/9780415492447.3d 3URRI 18 ELIMINATIVISM, COMPLEXITY, AND EMERGENCE Terrence Deacon and Tyrone Cashman The emergence paradox The evolutionary perspective turned the classic worldview on its head. Since Roman times, the world was understood to be hierarchic in structure, explained by a transcen- dent mind at the top. From there, the great chain of being cascaded down through angels, humans, frogs, protozoa, and finally stones. Inverting the chain of being switched mind from being7D\ORU )UDQFLV the ultimate explanation of things, to being the mystery to be explained. As an early critic of Darwin protested, this theory assumes that “Absolute Ignorance” is the ultimate artificer, even of life and mind (MacKenzie 1868). However, the1RWIRUGLVWULEXWLRQ notion that the distinctive properties of life and mind were pro- duced by a blind mechanism from inanimate matter runs counter to a fundamental assumption of Western thought. It is expressed in the oft-quoted dictum of the Roman poet–scientist Lucretius: “ex nihilo nihil fit,” from nothing, nothing [can be] produced (1994 [n.d.]). -
Phylogenetic Systematics and the Evolutionary History of Some Intestinal Flatworm Parasites (Trematoda: Digenea: Plagiorchi01dea) of Anurans
PHYLOGENETIC SYSTEMATICS AND THE EVOLUTIONARY HISTORY OF SOME INTESTINAL FLATWORM PARASITES (TREMATODA: DIGENEA: PLAGIORCHI01DEA) OF ANURANS by RICHARD TERENCE 0'GRADY B.Sc, University Of British Columbia, 1978 M.Sc, McGill University, 1981 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE FACULTY OF GRADUATE STUDIES Department Of Zoology We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA March 1987 © Richard Terence O'Grady, 1987 In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of Zoology The University of British Columbia 2075 Wesbrook Place Vancouver, Canada V6T 1W5 Date: March 24, 1987 i i Abstract Historical structuralism is presented as a research program in evolutionary biology. It uses patterns of common ancestry as initial hypotheses in explaining evolutionary history. Such patterns, represented by phylogenetic trees, or cladograms, are postulates of persistent ancestral traits. These traits are evidence of historical constraints on evolutionary change. Patterns and processes consistent with a cladogram are considered to be consistent with an initial hypothesis of historical constraint. As an application of historical structuralism, a phylogenetic analysis is presented for members of the digenean plagiorchioid genera Glypthelmins Stafford, 1905 and Haplometrana Lucker, 1931. -
Molecular Evolution
SYSTEMATICS & EVOLUTION Molecular Evolution GINCY C GEORGE (Assistant Professor On Contract) Molecular Evolution Molecular Evolution • Molecular evolution is the area of evolutionary biology that studies evolutionary change at the level of the DNA sequence. Molecular Evolution • It includes the study of rates of sequence change, relative importance of adaptive and neutral changes, and changes in genome structure. Molecular evolution examines DNA and proteins, addressing two types of questions: How do DNA and proteins evolve? How are genes and organisms evolutionarily related? Study of how genes and proteins evolve and how are organisms related based on their DNA sequence • Molecular evolution therefore is the determination and comparative study of DNA and deduced amino acid sequences. • Sequences from different organisms or populations are matched or aligned • Evolution at molecular level is observable at the base (nucleotide) level changes in the DNA and amino acid changes in proteins • Both can be studied by examining the differences between species • Both polymorphism and evolutionary changes between species can be explained by two processes ie; • Natural selection and Neutral drift • The main factors that influence Natural selection and Neutral drift are population size and the selection coefficient of the different genotypes • If the population is small and the selection coefficient low; genetic drift dominates, • Whereas natural selection dominates if the population and selection coefficients are large • Evolution of Modern species -
Concerted Evolution at the Population Level: Pupfish Hindill Satellite DNA Sequences JOHN F
Proc. Nati. Acad. Sci. USA Vol. 91, pp. 994-998, February 1994 Evolution Concerted evolution at the population level: Pupfish HindIll satellite DNA sequences JOHN F. ELDER, JR.* AND BRUCE J. TURNER Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 Communicated by Bruce Wallace, October 18, 1993 ABSTRACT The canonical monomers (170 bp) of an organisms. There are very little data on their variation within abundant (1.9 x 10' copies per diploid genome) satellite DNA or divergence among conspecific natural populations. sequence family In the genome of Cyprinodon wriegau, a We report here sequence comparisons ofthe predominant "pph" that ranges along the Atlantic coast fom Cape Cod or "canonical" monomers of a satellite DNA array in sam- to central Mexico, are divergent in base sequence in 10 of 12 ples of 12 natural populations of Cyprinodon variegatus smle collected from natural populations. The divergence (Cyprinodontidae), a coastal killifish species. Ten of these Involves sbsitions, deletis, and insertions, is marked in samples have distinctive and characteristic canonical mono- scoe (mean pairwise sequence slarit = 61.6%; range = mers with high levels of intraindividual and intrapopulation 35-95.9%), Is largely ed to the 3' half of the monomer, homogeneity.t In other words, this satellite DNA has appar- and Is not correlated with the disace among cllg sites. ently undergone concerted evolution at or near the level of Repetitive loning and direct genomic sequencing expriments the local population. failed to detect intrapopulation and intraindividual variation, A preliminary account of some of our early findings has hig levels of sequence homogeneity within popu- appeared in a symposium volume (6). -
Molecular Facts and Evolutionary Theory
Journal and Proceedings of The Royal Society of New South Wales Volume 120 Parts 1 and 2 [Issued September, 1987] pp.39-48 Return to CONTENTS Molecular Facts and Evolutionary Theory George L. Gabor Miklos Evolutionary biology has had a fascinating recent history. It was realized more than a century ago that the way of approaching many evolutionary problems lay in studies of morphology. However, as pointed out by Bateson in 1922, “discussions of evolution came to an end primarily because no progress was being made. Morphology having been explored in the minutest corners, we turned elsewhere. We became geneticists in the conviction that there at least must evolutionary wisdom be found.” At the same time, while it was clear that morphology must have its bases in embryology, it was instead the mathematically oriented theory of neo-Darwinism that rose to prominence over the next half century. This theory is essentially an amalgam of Mendelian genetics and classical Darwinian selection, firmly based on changes in gene frequencies at particular loci. In the late 1960s, it began to be evaluated at a crude molecular level using gel electrophoresis techniques that allowed the examination of polymorphisms at many enzyme coding loci. In the mid 1970s the technological advances of genetic engineering ushered in an entirely new era of molecular biology. The molecular biologist became the successor to the pure geneticist, and the focus switched back to the molecular analysis of development. The molecular biology of recombinant DNA revolutionized the previous concepts of genome organization and function and led to a reappraisal of the importance of neo-Darwinism. -
Trinitizing the Universe: Teilhard's Theogenesis and the Dynamism Of
Open Theology 2018; 4: 158–169 Intersubjectivity and Reciprocal Causality within Contemporary Understanding of the God-World Relationship Ilia Delio* Trinitizing the Universe: Teilhard’s Theogenesis and the Dynamism of Love https://doi.org/10.1515/opth-2018-0011 Received January 20, 2018; accepted January 24, 2018 Abstract: The God-world relationship bears an ambiguous relationship between God’s immanent life and God’s life in history. The development of the doctrine of the Trinity in the early Church gave rise to a distinction between theologia and oikonomia. Bonaventure’s theology sought to express an economic trinitarianism without compromising the integrity of God’s life, thus maintaining divine immutability and divine impassibility. Twentieth century trinitarian theologies challenge the notion of divine immutability in light of modern science and radical suffering. This paper develops on the heels of twentieth century theology by focusing in particular on the philosophical shifts rendered by modern science and technology. In particular, the insights of Pierre Teilhard de Chardin are explored with regard to Trinity and evolution, precisely because Teilhard intuited that evolution and the new physics evoke a radically new understanding of God. Building on Teilhard’s insights, I suggest that divine creative love is expressed in a fourth mystery which Teilhard called ‟pleromization.” Pleromization is the outflow of divine creative union or, literally, God filling the universe with divine life. Teilhard recapitulates this idea in the evolution of Christ so that theologia and oikonomia are one movement of divine love. My principal thesis is that the Trinity is integrally related to the world; the fullness of divine love includes the personalization of created reality, symbolized by the Christ. -
Creation and the Theory of Evolution
University of Pennsylvania ScholarlyCommons Boardman Lectureship in Christian Ethics Department of Religious Studies 4-24-1997 Creation and the Theory of Evolution Francisco J. Ayala University of California, Irvine Wolfhart Pannenberg University of Munich Follow this and additional works at: https://repository.upenn.edu/boardman Part of the Ecology and Evolutionary Biology Commons Recommended Citation Ayala, Francisco J. and Pannenberg, Wolfhart, "Creation and the Theory of Evolution" (1997). Boardman Lectureship in Christian Ethics. 6. https://repository.upenn.edu/boardman/6 Boardman Lecture XXXV. Edited and Foreword by Susan Marks. This paper is posted at ScholarlyCommons. https://repository.upenn.edu/boardman/6 For more information, please contact [email protected]. Creation and the Theory of Evolution Abstract The Boardman Lecture, in cooperation with the Center For Theology and The Natural Sciences and The John Templeton Foundation, funded a conference on Creation and Theory of Evolution. The conference explored religion and science by offering two different approaches to the question of human origins. Geneticist Francisco Ayala explains the present state of our understanding of evolution and argues that such human phenomena as morality and religion are by-products of the evolutionary process that cannot be explained by natural selection. His lecture appears as "The Evolutionary Transcendence of Humankind." Dr. Pannenberg stressed that the God of religious faith must be the Creator of the same nature that is studied by scientists. He explores aspects of the Genesis creation story that are compatible with the theory of evolution. His lecture is "Human Life: Creation Versus Evolution?" Disciplines Ecology and Evolutionary Biology Comments Boardman Lecture XXXV. -
Table of Contents
PHYSICS OF THE WORLD-SOUL: THE RELEVANCE OF ALFRED NORTH WHITEHEAD’S PHILOSOPHY OF ORGANISM TO CONTEMPORARY SCIENTIFIC COSMOLOGY Matthew David Segall Editor’s Note: Alfred North Whitehead was a British mathematician, logician and philosopher. His early work, as a student and professor at Cambridge University, was on mathematics and logic. The second period, 1910-24, when he had appointments at University College London and Imperial College of Science and Technology in London, he concentrated on the philosophy of science. The last period, beginning in 1924 and during which he taught philosophy at Harvard, he concentrated on Alfred North Whitehead metaphysics. His philosophy is known as both (1861-1947) philosophy of organism and process philosophy. Copyright © 2013 by Matthew David Segall All rights reserved. Without limiting the rights under copyright reserved above, no part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted, in any form, or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of the copyright owner. Table of Contents INTRODUCTION: FROM PHYSICS TO PHILOSOPHY 2 THE SUNSET OF MATERIALISM: WHITEHEAD’S PHILOSOPHY OF SCIENCE 8 WHITEHEAD’S ONTOLOGY OF ORGANISM 16 WHITEHEAD AND CONTEMPORARY SCIENTIFIC THEORY 25 The Imaginative Generalization of Evolutionary Theory 28 Space-Time in an Ontology of Organism 33 Quantum Decoherence and the Incompleteness of Nature 42 TOWARDS A PHYSICS OF THE WORLD-SOUL 51 BIBLIOGRAPHY 59 1 INTRODUCTION: FROM PHYSICS TO PHILOSOPHY How shallow, puny, and imperfect are efforts to sound the depths in the nature of things. In philosophical discussion, the merest hint of dogmatic certainty as to finality of statement is an exhibition of folly. -
University of Michigan University Library
CONTRIBUTIONS FROM THE MUSEUM OF PACEONTOLOGY UNIVERSITY OF MICHIGAN VOL M, No. 5, pp. 173-215 Nomm 6, 1951 THE DILEMMA OF THE PALEONTOLOGIST BY E. C. CASE UNIVERSITY OF MICHIGAN PRESS ANN ARBOR CONTRIBUTIONS FROM THE MUSEUM OF PALEONTOLOGY UNIVERSITY OF MICHIGAN Director: LEWISB. KELLUM The series of contributions from the Museum of Paleontology is a medium for the publication of papers based chiefly upon the collections in the Museum. When the number of pages issued is sufficient to make a volume, a title page and a table of contents will be sent to libraries on the mailing list, and also to individuals upon request. Correspondence should be directed to the University of Michigan Press. A list of the separate papers in Volumes 11-VIII will be sent upon request. VOL. I. The Stratigraphy and Fauna of the Hackberry Stage of the Upper Devonian, by C. L. Fenton and M. A. Fenton. Pages xi+260. Cloth. $2.75. VOL. 11. Fourteen papers. Pages ix+240. Cloth. $3.00. Parts sold separately in paper covers. VOL. 111. Thirteen papers. Pages viii+275. Cloth. $3.50. Parts sold separately in paper covers. VOL. IV. Eighteen papers. Pages viii+295. Cloth. $3.50. Parts sold separately in paper covers. VOL. V. Twelve papers. Pages viii+318. Cloth. $3.50. Parts sold separately in paper covers. VOL. VI. Ten papers. Pages viii+336. Paper covers. $3.00. Parts sold separately. VOL. VII. Ten numbers sold separately. VOL. VIII. Ten numbers sold separately. (Continued on inside back cover) VOL. IX, No. 5, pp. 173-215 NOVEMBER6, 1951 THE DILEMMA OF THE PALEONTOLOGIST' BY E. -
Adaptive Protein Evolution in Animals and the Effective Population Size Hypothesis Nicolas Galtier
Adaptive Protein Evolution in Animals and the Effective Population Size Hypothesis Nicolas Galtier To cite this version: Nicolas Galtier. Adaptive Protein Evolution in Animals and the Effective Population Size Hypothesis. PLoS Genetics, Public Library of Science, 2016, 12 (1), 10.1371/journal.pgen.1005774. hal-01900669 HAL Id: hal-01900669 https://hal.archives-ouvertes.fr/hal-01900669 Submitted on 22 Oct 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. RESEARCH ARTICLE Adaptive Protein Evolution in Animals and the Effective Population Size Hypothesis Nicolas Galtier* Institut des Sciences de l'Evolution UMR5554, Université Montpellier–CNRS–IRD–EPHE, Montpellier, France * [email protected] Abstract The rate at which genomes adapt to environmental changes and the prevalence of adaptive processes in molecular evolution are two controversial issues in current evolutionary genet- ics. Previous attempts to quantify the genome-wide rate of adaptation through amino-acid substitution have revealed a surprising diversity of patterns, with some species (e.g. Dro- sophila) experiencing a very high adaptive rate, while other (e.g. humans) are dominated by nearly-neutral processes. It has been suggested that this discrepancy reflects between- OPEN ACCESS species differences in effective population size.