Hermaphroditism avise john. Hermaphroditism ISBN 9780231153867 PDF epub 2019-02-14

Hermaphroditism avise john Rating: 6,3/10 690 reviews

Hermaphroditism (豆瓣)

hermaphroditism avise john

All of these and additional hermaphroditic phenomena in fishes find their near-perfect analogues in many species of plants and invertebrate animals that also display various forms of dual sexuality. Filled with surprising creatures and compelling revelations, this textbook stands alone in its clear yet comprehensive treatment of hermaphroditism and its unique challenge to the supremacy of separate sexes. The great Hindu deity Shiva is often portrayed as partially fused with his female alter ego, Parvati. He thereby helped to pioneer the fields of molecular ecology and molecular evolution. Avise describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. For example, in some people the phallus is midway in size and shape between a penis and a clitoris; and in other people the labia are partially fused into a scrotum-like structure.

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John Avise

hermaphroditism avise john

Avise describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. Tiresias—the blind prophet-priest of Zeus—was another type of hermaphrodite who in this case switched sequentially between male and female. Hermaphroditic creatures reproduce both as male and as female individuals, providing a fascinating glimpse into alternative sexual practices in nature and their ecological and evolutionary successes and failures. Filled with surprising creatures and compelling revelations, this textbook stands alone in its clear yet comprehensive treatment of hermaphroditism and its unique challenge to the supremacy of separate sexes. Eloquently written by an award-winning biologist and pioneer in molecular ecology, this primer on hermaphroditism traces the phenomenon throughout Earth's myriad species, accounting for the adaptive significance of alternative sexual systems. Sexual reproduction greatly facilitates genetic recombination, and clearly has been an extremely successful evolutionary strategy. Eloquently written by an award-winning biologist and pioneer in molecular ecology, this primer traces the phenomenon of hermaphroditism throughout Earth's species and the adaptive significance of alternative sexual systems.

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Hermaphroditism by John C. Avise · OverDrive (Rakuten OverDrive): eBooks, audiobooks and videos for libraries

hermaphroditism avise john

Eloquently written by an award-winning biologist and pioneer in molecular ecology, this primer on hermaphroditism traces the phenomenon throughout Earth's myriad species, accounting for the adaptive significance of alternative sexual systems. As a boy, Hermaphroditus was raised by nymphs on sacred Mount Ida, in what now is the country of Turkey. Dual-sex Vertebrates Sexual Flexibility Sequential Hermaphroditism Adaptive Significance of Alternative Modes Simultaneous Hermaphroditism Summary Glossary References Cited Index. Avise describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. While it is true that members of most sexually reproducing species can be defined as either male or female, those who belong to the rest of the biological world are not so simply understood. The volume's accessible and richly illustrated text covers the evolutionary origins of hermaphroditism and its historical and fictional instances, proving the relevance of dual sexuality to the everyday world.

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Hermaphroditism : John Avise : 9780231153867

hermaphroditism avise john

It describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. Following gametogenesis in diploid females, each haploid oocyte or egg carries one copy of the X-chromosome; and following gametogenesis in diploid males, each haploid sperm carries either an X-chromosome or a Y-chromosome with about equal likelihood given the segregation rule of Mendelian inheritance. As a reward, Hera permitted Tiresias to regain the male condition. For example, a central idea in Hinduism is that souls transmigrate such that an individual is reborn time and again, often in opposite sex to that of the previous life. ¹A few species among the other 1% consist solely of females who reproduce asexually, or clonally i.

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John Avise

hermaphroditism avise john

Thus, they join the vast majority 99. Intersexualities of this general type also occur sporadically in many separate-sex vertebrate species Armstrong and Marshall 1964. In these and many other hermaphroditic plant and animal species, each dual-sex individual can reproduce both as a male and as a female during its lifetime. It raises, for example, the issue of what defines a male versus a female in any species, which in turn motivates the question of what constitutes a male gamete versus a female gamete. Hermaphroditism in Fiction Dual sexuality apparently held a special fascination for the ancient Greeks, as gauged by its prominence in their classical mythologies.

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Hermaphroditism : a primer on the biology, ecology, and evolution of dual sexuality (eBook, 2011) [tooluser.org]

hermaphroditism avise john

Bibliography Includes bibliographical references p. Accessible and richly illustrated, the text maps the evolutionary origins of hermaphroditism, as well as its historical instances and fictional representations, underscoring the relevance of dual sexuality to our biological, intellectual, and cultural making. Choice Avise's book is truly what is expected from a primer, and ought to be read by all researchers interested in hermaphroditism, perhaps even more botanists than zoologists. In separate-sex animal species, oogenesis the production of oocytes or unfertilized eggs and spermatogenesis the production of sperm take place in separate female and male individuals. Thus, whether a boy or a girl results from a particular conception is dictated by whether a Y-bearing sperm or an X-bearing sperm fertilizes the focal egg.

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Hermaphroditism : a primer on the biology, ecology, and evolution of dual sexuality (eBook, 2011) [tooluser.org]

hermaphroditism avise john

In some hermaphroditic fish species, an individual may begin its life as a functional male and then later switch to become a functional female, whereas in other species most individuals begin life as females before perhaps later transforming into functional males. With respect to ontogeny individual development , hermaphroditism begs questions about the genetic and environmental determinants as well as the proximate hormonal and physiological underpinnings of dual sexuality. Finally, in one small taxonomic group of fishes, each hermaphroditic individual normally reproduces by fertilizing itself. In dual-sex species, each hermaphroditic individual normally has the capacity to produce both male and female gametes, either simultaneously or sequentially. This new book, for the first time, assembles our state-of-the-art understanding of the biology of hermaphrodite gender expression, and makes the current research agenda on these fascinating organisms broadly accessible to both scientists and under- graduate students.

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Hermaphroditism by John C. Avise · OverDrive (Rakuten OverDrive): eBooks, audiobooks and videos for libraries

hermaphroditism avise john

Hermaphroditism also recurs as a theme in modern fiction. Agdistis was another hermaphrodite in Greek mythology. The Johns Hopkins University Press. S he was conceived one day when Zeus fell asleep upon the ground and some of his leaked seed semen accidentally impregnated Gaia mother Earth. For example, approximately 95% of all species of flowering plants angiosperms include at least some dual-sex individuals hermaphrodites , as do more than 50,000 species of invertebrates. Accessible and richly illustrated, the text maps the evolutionary origins of hermaphroditism, as well as its historical instances and fictional representations, underscoring the relevance of dual sexuality to our biological, intellectual, and cultural making.

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Hermaphroditism by John C. Avise · OverDrive (Rakuten OverDrive): eBooks, audiobooks and videos for libraries

hermaphroditism avise john

Dual-sex Vertebrates Sexual Flexibility Sequential Hermaphroditism Adaptive Significance of Alternative Modes Simultaneous Hermaphroditism Summary Glossary References Cited Index This book provides a basic, nontechnical introduction to sexual systems for a wide audience of readers. Evolutionary Pathways in Nature: A Phylogenetic Approach 1 ed. Filled with surprising creatures and inherently compelling topics, this book stands alone in its clear yet comprehensive treatment of hermaphroditism and its unique challenge to the supremacy of separate sexes. Seven years later, Tiresias again encountered two mating snakes, but this time she left the serpents alone. Avise describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. Filled with surprising creatures and compelling revelations, this textbook stands alone in its clear yet comprehensive treatment of hermaphroditism and its unique challenge to the supremacy of separate sexes. He is an elected member of both the National Academy of Sciences and the American Academy of Arts and Sciences, and the author or editor of 20 books, including most recently Inside the Human Genome: A Case for Non-intelligent Design; Molecular Ecology and Evolution: The Organismal Side; and Clonality: The Genetics, Ecology, and Evolution of Sexual Abstinence in Vertebrate Animals.

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