Evolution And Diversity Of Sex Ratio

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Evolution and Diversity of Sex Ratio

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Author : Dana Wrensch
Publisher : Springer
ISBN 13 : 9780412022210
Total Pages : 634 pages
Book Rating : 4.0/5 (222 download)

Book Synopsis Evolution and Diversity of Sex Ratio by : Dana Wrensch

Download or read book Evolution and Diversity of Sex Ratio written by Dana Wrensch and published by Springer. This book was released on 1993-06-30 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Darwin first raised the question of sex ratio evolution, and saw it as both important and enigmatic. He was, however, unable to make much headway with the problem and declared it a puzzle for the future. This particular future arrived about 60 years later, when R. A. Fisher (1930) pointed out that under autosomal inheritance half of the genes passed to zygotes in any generation come from males and half come from females. Fisher noted that this one-mother/one-father symmetry generates frequency dependent natural selection on sex ratio, resulting in an evolutionary equi librium in which half of the reproductive resources are devoted to daughters and half to sons. Although widespread interest in sex ratio as a phenotypic trait did not occur for another 30 years, it is difficult for us to overestimate the impor tance of Fisher's brief and characteristically cryptic remarks. Almost all of the innovations in thinking about sex ratio can be viewed as alterations of one or more implicit assumptions in Fisher's scheme. The present book on insect sex ratios is testimony to the fruitfulness of his original ideas and of their descendants.

Evolution and Diversity of Sex Ratio

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Author : Dana Wrensch
Publisher : Springer
ISBN 13 : 9781468414028
Total Pages : 0 pages
Book Rating : 4.4/5 (14 download)

Book Synopsis Evolution and Diversity of Sex Ratio by : Dana Wrensch

Download or read book Evolution and Diversity of Sex Ratio written by Dana Wrensch and published by Springer. This book was released on 1993-07-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Darwin first raised the question of sex ratio evolution, and saw it as both important and enigmatic. He was, however, unable to make much headway with the problem and declared it a puzzle for the future. This particular future arrived about 60 years later, when R. A. Fisher (1930) pointed out that under autosomal inheritance half of the genes passed to zygotes in any generation come from males and half come from females. Fisher noted that this one-mother/one-father symmetry generates frequency dependent natural selection on sex ratio, resulting in an evolutionary equi librium in which half of the reproductive resources are devoted to daughters and half to sons. Although widespread interest in sex ratio as a phenotypic trait did not occur for another 30 years, it is difficult for us to overestimate the impor tance of Fisher's brief and characteristically cryptic remarks. Almost all of the innovations in thinking about sex ratio can be viewed as alterations of one or more implicit assumptions in Fisher's scheme. The present book on insect sex ratios is testimony to the fruitfulness of his original ideas and of their descendants.

Theoretical Studies on Sex Ratio Evolution. (MPB-22), Volume 22

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Author : Samuel Karlin
Publisher : Princeton University Press
ISBN 13 : 069121011X
Total Pages : 333 pages
Book Rating : 4.6/5 (912 download)

Book Synopsis Theoretical Studies on Sex Ratio Evolution. (MPB-22), Volume 22 by : Samuel Karlin

Download or read book Theoretical Studies on Sex Ratio Evolution. (MPB-22), Volume 22 written by Samuel Karlin and published by Princeton University Press. This book was released on 2020-03-31 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with a key area of population genetics: the ratio of the sexes in a population, or the allocation of resources to male versus female reproductive function. Samuel Karlin and Sabin Lessard establish the formal theoretical aspects of the evolution of sex ratio within the constraints of genetic mechanisms of sex determination. Their results generalize and unify existing work on the topic, strengthening previous conceptions in some cases and, in other instances, offering new directions of research. There are two main approaches to understanding the causes and effects of sex ratio. One approach focuses on the optimization and adaptive functions of sex allocation, while the other emphasizes the consequences of genetic sex determination mechanisms. In discussing the utility of these two approaches, Professors Karlin and Lessard examine the principal sex-determining mechanisms and facts involved in sex ratio representations, the various genetic and environmental factors that contribute to adaptive sex expression, and the evolution of sex determining systems and controls. From a population genetic perspective, the authors derive evolutionary properties in support of the high incidence of 1:1 sex ratio in natural populations and investigate the conditions that can explain the occurrence of biased sex ratio.

Theoretical Studies on Sex Ratio Evolution

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Author : Samuel Karlin
Publisher :
ISBN 13 : 9780608063027
Total Pages : 330 pages
Book Rating : 4.0/5 (63 download)

Book Synopsis Theoretical Studies on Sex Ratio Evolution by : Samuel Karlin

Download or read book Theoretical Studies on Sex Ratio Evolution written by Samuel Karlin and published by . This book was released on with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Evolution of Sex Determination

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Author : Leo W. Beukeboom
Publisher :
ISBN 13 : 0199657149
Total Pages : 243 pages
Book Rating : 4.1/5 (996 download)

Book Synopsis The Evolution of Sex Determination by : Leo W. Beukeboom

Download or read book The Evolution of Sex Determination written by Leo W. Beukeboom and published by . This book was released on 2014 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sexual reproduction is a fundamental aspect of life. It is defined by the occurrence of meiosis and the fusion of two gametes of different sexes or mating types. Sex-determination mechanisms are responsible for the sexual fate and development of sexual characteristics in an organism, be it a unicellular alga, a plant, or an animal. In many cases, sex determination is genetic: males and females have different alleles or different genes that specify their sexual morphology. In animals, this is often accompanied by chromosomal differences. In other cases, sex may be determined by environmental (e.g. temperature) or social variables (e.g. the size of an organism relative to other members of its population). Surprisingly, sex-determination mechanisms are not evolutionarily conserved but are bewilderingly diverse and appear to have had rapid turnover rates during evolution. Evolutionary biologists continue to seek a solution to this conundrum. What drives the surprising dynamics of such a fundamental process that always leads to the same outcome: two sex types, male and female? The answer is complex but the ongoing genomic revolution has already greatly increased our knowledge of sex-determination systems and sex chromosomes in recent years. This novel book presents and synthesizes our current understanding, and clearly shows that sex-determination evolution will remain a dynamic field of future research. The Evolution of Sex Determination is an advanced, research level text suitable for graduate students and researchers in genetics, developmental biology, and evolution.

The Theory of Sex Allocation. (MPB-18), Volume 18

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Author : Eric L. Charnov
Publisher : Princeton University Press
ISBN 13 : 0691210055
Total Pages : 369 pages
Book Rating : 4.6/5 (912 download)

Book Synopsis The Theory of Sex Allocation. (MPB-18), Volume 18 by : Eric L. Charnov

Download or read book The Theory of Sex Allocation. (MPB-18), Volume 18 written by Eric L. Charnov and published by Princeton University Press. This book was released on 2020-03-31 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first comprehensive treatment of sex allocation from the standpoint of modern evolutionary theory. It shows how the determination of sex ratio, resource allocation to sperm versus egg within simultaneous hermaphroditism, and the evolution of sex reversal can he explained as examples of a single process. The genetical theory, developed mostly with graphical arguments, also specifies when hermaphroditism and dioecy are themselves evolutionary stable. The work balances theory with field and laboratory research, providing critical tests of the theory by empirical studies of sex ratio in parasitoid wasps and mites, sex reversal in shrimp and coral reef fish, and allocation of resources to pollen versus seeds in higher plants. In addition, the author oilers an encyclopedic review of the field and laboratory work of other scientists, reviews many as yet untested hypotheses in sex allocation, and points toward numerous plant and animal systems that hold promise for future tests.

Sex Ratios

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Author : Ian Hardy
Publisher :
ISBN 13 : 9780511069932
Total Pages : 424 pages
Book Rating : 4.0/5 (699 download)

Book Synopsis Sex Ratios by : Ian Hardy

Download or read book Sex Ratios written by Ian Hardy and published by . This book was released on 2002 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sex ratios, the proportions of males and females in any given species, are important in evolutionary and behavioural ecology. This volume explores the context to and methods for many aspects of research on sex ratios, and will be an indispensable reference for all those working in this area.

Sex Ratio Variation and Evolution

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Author : M. A. T. Ibanez
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (535 download)

Book Synopsis Sex Ratio Variation and Evolution by : M. A. T. Ibanez

Download or read book Sex Ratio Variation and Evolution written by M. A. T. Ibanez and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sex-ratio Evolution in Reptiles with Environmental Sex Determination

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Author : Steven Freedberg
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.3/5 ( download)

Book Synopsis Sex-ratio Evolution in Reptiles with Environmental Sex Determination by : Steven Freedberg

Download or read book Sex-ratio Evolution in Reptiles with Environmental Sex Determination written by Steven Freedberg and published by . This book was released on 2003 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evolution's Rainbow

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Author : Joan Roughgarden
Publisher : Univ of California Press
ISBN 13 : 0520957970
Total Pages : 491 pages
Book Rating : 4.5/5 (29 download)

Book Synopsis Evolution's Rainbow by : Joan Roughgarden

Download or read book Evolution's Rainbow written by Joan Roughgarden and published by Univ of California Press. This book was released on 2013-09-14 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this innovative celebration of diversity and affirmation of individuality in animals and humans, Joan Roughgarden challenges accepted wisdom about gender identity and sexual orientation. A distinguished evolutionary biologist, Roughgarden takes on the medical establishment, the Bible, social science—and even Darwin himself. She leads the reader through a fascinating discussion of diversity in gender and sexuality among fish, reptiles, amphibians, birds, and mammals, including primates. Evolution's Rainbow explains how this diversity develops from the action of genes and hormones and how people come to differ from each other in all aspects of body and behavior. Roughgarden reconstructs primary science in light of feminist, gay, and transgender criticism and redefines our understanding of sex, gender, and sexuality. Witty, playful, and daring, this book will revolutionize our understanding of sexuality. Roughgarden argues that principal elements of Darwinian sexual selection theory are false and suggests a new theory that emphasizes social inclusion and control of access to resources and mating opportunity. She disputes a range of scientific and medical concepts, including Wilson's genetic determinism of behavior, evolutionary psychology, the existence of a gay gene, the role of parenting in determining gender identity, and Dawkins's "selfish gene" as the driver of natural selection. She dares social science to respect the agency and rationality of diverse people; shows that many cultures across the world and throughout history accommodate people we label today as lesbian, gay, and transgendered; and calls on the Christian religion to acknowledge the Bible's many passages endorsing diversity in gender and sexuality. Evolution's Rainbow concludes with bold recommendations for improving education in biology, psychology, and medicine; for democratizing genetic engineering and medical practice; and for building a public monument to affirm diversity as one of our nation's defining principles.

Theoretical Elements of Sex Ratio Evolution

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Author : Joseph William Stubblefield
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (77 download)

Book Synopsis Theoretical Elements of Sex Ratio Evolution by : Joseph William Stubblefield

Download or read book Theoretical Elements of Sex Ratio Evolution written by Joseph William Stubblefield and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

In the Light of Evolution

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Author : National Academy of Sciences
Publisher :
ISBN 13 :
Total Pages : 388 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis In the Light of Evolution by : National Academy of Sciences

Download or read book In the Light of Evolution written by National Academy of Sciences and published by . This book was released on 2007 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arthur M. Sackler Colloquia of the National Academy of Sciences address scientific topics of broad and current interest, cutting across the boundaries of traditional disciplines. Each year, four or five such colloquia are scheduled, typically two days in length and international in scope. Colloquia are organized by a member of the Academy, often with the assistance of an organizing committee, and feature presentations by leading scientists in the field and discussions with a hundred or more researchers with an interest in the topic. Colloquia presentations are recorded and posted on the National Academy of Sciences Sackler colloquia website and published on CD-ROM. These Colloquia are made possible by a generous gift from Mrs. Jill Sackler, in memory of her husband, Arthur M. Sackler.

The Explanation of Organic Diversity

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Author : Mark Ridley
Publisher : Oxford University Press, USA
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (318 download)

Book Synopsis The Explanation of Organic Diversity by : Mark Ridley

Download or read book The Explanation of Organic Diversity written by Mark Ridley and published by Oxford University Press, USA. This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The explanation of organic diversity: the comparative method and adaptations for mating.

The Evolution of Sex

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Author : John Maynard Smith
Publisher : Cambridge University Press
ISBN 13 : 9780521218870
Total Pages : 236 pages
Book Rating : 4.2/5 (188 download)

Book Synopsis The Evolution of Sex by : John Maynard Smith

Download or read book The Evolution of Sex written by John Maynard Smith and published by Cambridge University Press. This book was released on 1978-08-24 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The question of why organisms reproduce sexually is still a matter of controversy. In this account, Professor Maynard Smith considers the selective forces responsible for the origin and evolution of sexual reproduction and genetic recombination, using quantitative population genetics arguments to support his ideas. The relative importance of individual and group selection processes are also considered. the aim is to give a clear statement of the theoretical issues, and present enough of the evidence to show what kinds of facts are relevant. It is hoped that where crucial evidence is missing, experimentalists and field workers may be encouraged to collect the relevant data. The author does not claim to solve all the problems he raises, but this clear and well-argued account should provide stimulating reading for advanced undergraduate students and research workers in evolutionary theory.

The Genetics of Human Sex Ratio Evolution

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Author : Corry Gellatly
Publisher :
ISBN 13 :
Total Pages : 295 pages
Book Rating : 4.:/5 (665 download)

Book Synopsis The Genetics of Human Sex Ratio Evolution by : Corry Gellatly

Download or read book The Genetics of Human Sex Ratio Evolution written by Corry Gellatly and published by . This book was released on 2010 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sex Determination in Plants

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Author : CC Ainsworth
Publisher : Garland Science
ISBN 13 : 1135325650
Total Pages : 219 pages
Book Rating : 4.1/5 (353 download)

Book Synopsis Sex Determination in Plants by : CC Ainsworth

Download or read book Sex Determination in Plants written by CC Ainsworth and published by Garland Science. This book was released on 2004-08-02 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indispensable for all plant biologists, this is a fascinating and thorough examination of those factors which affect the sex determination of plant species, describing all of the main classes of plant with unisexual flowers hermaphrodite, monoecious and

Evolution of Sex Determining Mechanisms

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Author : James J. Bull
Publisher : Benjamin-Cummings Publishing Company
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.:/5 (318 download)

Book Synopsis Evolution of Sex Determining Mechanisms by : James J. Bull

Download or read book Evolution of Sex Determining Mechanisms written by James J. Bull and published by Benjamin-Cummings Publishing Company. This book was released on 1983 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: