Download or read book Meiotic Configurations written by J. Sybenga and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the monographs is to foster effective intra- and interdisciplinary communication between geneticists, and plant and animal breeders. This is to be achieved by publishing authoritative up-to-date texts; concise, but at the same time comprehensive, monographs, and multiauthor volumes on theoretical and applied genetics. The following broad fields of genetics and breeding are within the scope of the series: Evolutionary genetics Developmental genetics Population genetics Biochemical genetics Ecological genetics Somatic cell genetics Biometrical genetics Agricultural genetics Cytogenetics Mutation breeding Radiation genetics Breeding methodology Acceptable subjects for the Monographs on Theoretical and Applied Genetics are basic and applied aspects of genetic variation; genetic resources; genetic exchange and reproduction; mutagenesis; genotype-environment interaction; gene structure, regulation, action, expression and interaction; chromosomal and extrachromosomal inheritance of economic traits, and genetic models and simulations. September 1975 The Editors Preface Meiotic configurations are looked at from a special point of view in this book: the extraction from them of the maximal amount of quantitative information of genetic interest. Although this requires a certain understanding of their origin and consequences, much of what is known about chromosomes and their for mation into the special structures collected under the rather indiscriminate term I "configuration", is not considered relevant for this purpose, and simply neglected.
Download or read book Meiotic Configurations written by J. Sybeng and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiotic Configurations written by J. Sybeng and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiotic Configurations written by Jacob Sybenga and published by . This book was released on 1975 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Meiotic System written by Bernard John and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction When the study of heredity and variation first came to be treated as a scientific subject-and this, one must remember, was only just over a hundred years ago-there was an unfortunate separation between the disciplines of cytology and experimental breeding. This separation was based partly on a lack of understanding and partly on a lack of the desire to understand. Even WILLIAM BATESON, the first apostle of mendelism in England, had a blind spot for cytology and for many years dogmatically refused to believe that MENDEL'S determinants were transmitted and distributed by the chromosomes. This separation between cytology and experimental breeding is one which persists, in a measure, even today, simply because there are two quite different, though complementary, techniques available for the study of heredity and variation. On the one hand, one can study directly the structure and behaviour of the actual vehicles which transmit the genetic determinants from one generation to the next. This is the method employed by those who study genetics through a microscope. The alternative method is that used by the experimental breeder who, in default of being able to watch the hereditary factors segregate from each other directly, is obliged to examine the constitution of the germ cells indirectly by sampling, and usually at random, the products of a controlled mating.
Download or read book Meiosis written by Ricardo Benavente and published by Karger Medical and Scientific Publishers. This book was released on 2009 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meiosis is a key event in the life of all sexually reproductive organisms. As a consequence of recombination and segregation of maternal and paternal sets of chromosomes, it represents the largest natural source of genetic variability. The field of meiosis research is expanding rapidly, with significant progress resulting from the use of suitable model systems as well as from the identification and characterization of proteins, many of them meiosis-specific, which play a key role during meiotic events. This volume provides the reader with a series of authoritative review articles summarizing some of the most recent advances in the field of meiosis research. Most of the more commonly used model systems are investigated taking the comparative aspects into account. Written by leading experts in the field, the book is a valuable reference for researchers and graduate students in genetics, cell and developmental biology, reproductive biology and andrology.
Download or read book Meiosis and Gametogenesis written by and published by Academic Press. This book was released on 1997-11-24 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the fact that the process of meiosis is fundamental to inheritance, surprisingly little is understood about how it actually occurs. There has recently been a flurry of research activity in this area and this volume summarizes the advances coming from this work. All authors are recognized and respected research scientists at the forefront of research in meiosis. Of particular interest is the emphasis in this volume on meiosis in the context of gametogenesis in higher eukaryotic organisms, backed up by chapters on meiotic mechanisms in other model organisms. The focus is on modern molecular and cytological techniques and how these have elucidated fundamental mechanisms of meiosis. Authors provide easy access to the literature for those who want to pursue topics in greater depth, but reviews are comprehensive so that this book may become a standard reference. Key Features* Comprehensive reviews that, taken together, provide up-to-date coverage of a rapidly moving field* Features new and unpublished information* Integrates research in diverse organisms to present an overview of common threads in mechanisms of meiosis* Includes thoughtful consideration of areas for future investigation
Download or read book Meiosis written by Bernard John and published by Cambridge University Press. This book was released on 1990-04-12 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meiosis, the antithesis of fertilization, is the unique genetically programmed mode of nuclear division associated with a halving of the chromosome number in sexually reproducing eukaryotes. It thus represents a key cellular and developmental pathway in the life of an organism. In this book, Bernard John presents the first complete, and the most authoritative, review of the events and mechanisms of meiosis including their scheduling, their mechanics and their biochemistry as well as their genetic control and the variations to be found in them in both sexual and subsexual systems. The text is superbly illustrated with 131 figures and 73 tables. Meiosis must be regarded as essential reading for all students, teachers and research workers with an interest in eukaryotic cell biology and genetics.
Download or read book Meiotic Configurations for Chiasma Analysis written by Manuel Humberto Reyes-Valdes and published by . This book was released on 1996 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiotic Chromosome Organization written by Scott Rosenberg and published by . This book was released on 2017 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromosome segregation during meiosis is a two-step process, where homologous chromosomes segregate in the first meiotic division, and sister chromosomes segregate away in the second, thereby reducing ploidy by half. Homolog segregation in the first meiotic division requires that cells utilize a unique homologous recombination pathway to generate specific physical linkages between homologs in the form of chiasmata. Meiotic recombination involves the introduction of double-stranded breaks (DSBs) to the DNA, which are resected and used in a homology search to identify and associate with the homolog. The mechanisms that ensure accurate chromosome segregation during meiosis are important for maintaining genome stability, and errors in these processes have been shown to lead to miscarriages and developmental diseases like down syndrome. One of the key adaptations eukaryotic cells have evolved to enable this specialized homologous recombination pathway is a protein assembly called the chromosome axis. The chromosome axis, also known as the axial element (AE), is a highly conserved scaffold that assembles between sister chromosomes. The AE physically organizes the chromatin into a linear array of loops, and also provides a platform for recruitment of the recombination machinery and eventual assembly of the synaptonemal complex. Chromosome axis components are highly conserved in different organisms, and include cohesin complexes, meiotic HORMA domain proteins, and foundation axial element proteins. We find the four HORMA domain proteins from C. elegans organize into a hierarchical complex through binding of highly conserved motifs in their C-terminal tails. We show that the different levels of this hierarchy play distinct roles in regulating chromatin organization and the homologous recombination pathway. This work provides a foundation for understanding both initial recruitment and self-assembly of meiotic HORMADs throughout eukaryotes. We also find that the mammalian foundation AE proteins SYCP2 and SYCP3 self-assemble into higher order filaments, establishing a model for their roles in organizing meiotic chromosomes. Finally, we use next-generation sequencing to examine the organization of meiotic chromosomes in highly synchronized spermatocytes in two meiotic prophase stages, identifying both commonalities with somatic cells and distinct features of meiotic chromosome organization. Overall, this work advances our understanding of meiotic chromosome axis architecture and function across eukaryotes.
Download or read book Meiosis written by Andrew Swan and published by BoD – Books on Demand. This book was released on 2012-02-29 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meiosis, the process of forming gametes in preparation for sexual reproduction, has long been a focus of intense study. Meiosis has been studied at the cytological, genetic, molecular and cellular levels. Studies in model systems have revealed common underlying mechanisms while in parallel, studies in diverse organisms have revealed the incredible variation in meiotic mechanisms. This book brings together many of the diverse strands of investigation into this fascinating and challenging field of biology.
Download or read book Meiotic Crossover Position and Frequency are Regulated by Chromosome Structure in C Elegans written by David Gavin Mets and published by . This book was released on 2008 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stem Cells in Reproductive Medicine written by Carlos Simón and published by Cambridge University Press. This book was released on 2013-07-04 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stem cell science has the potential to impact human reproductive medicine significantly - cutting edge technologies allow the production and regeneration of viable gametes from human stem cells offering potential to preciously infertile patients. Written by leading experts in the field Stem Cells in Reproductive Medicine brings together chapters on the genetics and epigenetics of both the male and female gametes as well as advice on the production and regeneration of gene cells in men and women, trophoblasts and endometrium from human embryonic and adult stem cells. Although focussing mainly on the practical elements of the use of stem cells in reproductive medicine, the book also contains a section on new developments in stem cell research. The book is essential reading for reproductive medicine clinicians, gynecologists and embryologists who want to keep abreast of practical developments in this rapidly developing field.
Download or read book Comparative Genomics written by D. Sankoff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of genomic rearrangement, focusing on the mechanisms of inversion, translocation, gene and genome duplication and gene transfer and on the patterns that result from them in comparative maps. Includes analyses of genomic sequences in organelles, prokaryotes and eukaryotes as well as comparative maps of the nuclear genomes in higher plants and animals. The book showcases a variety of algorithmic and statistical approaches to rearrangement and map data.
Download or read book Controlling Events in Meiosis written by Clive W. Evans and published by . This book was released on 1984 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shrews Chromosomes and Speciation written by Jeremy B. Searle and published by Cambridge University Press. This book was released on 2019-02-28 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chromosome complement (karyotype) often differs between related mammalian species (including humans vs chimpanzees), such that evolutionary biologists muse whether chromosomal difference is a cause or a consequence of speciation. The common shrew is an excellent model to investigate this problem because of its many geographical races (potential species) differing chromosomally, and its several sibling species (recently speciated forms) that are also chromosomally different. This system is an exceptional opportunity to investigate the role of chromosomes in speciation and this volume reflects detailed research following these approaches. Highlights include the demonstration that chromosomal re-arrangements can be associated with complete loss of gene flow and thus speciation and that selection within species hybrid zones may lead to de-speciation rather than speciation. This book represents an extraordinarily detailed consideration of the role of chromosomes in speciation in one astonishing species, providing insights to those interested in mammalian diversity, chromosomal evolution and speciation.
Download or read book Chromosome Engineering in Plants written by P.K. Gupta and published by Newnes. This book was released on 1991-05-13 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume work surveys the entire range of general aspects of chromosome research on plants. This first volume is divided into two sections. Section A consists of 11 chapters covering the entire range of general aspects of chromosome research in plants (including a chapter on genetic engineering in crop improvement). Section B is devoted to cytogenetics of cereals and millets (wheat, rye, barley, triticale, oats, maize, rice, pearl millet, and minor millets). More than one chapter is devoted to the same crop to give a detailed treatment of chromosome research (including molecular biology) in these crops. The second volume deals with cytogenetics of plant materials including legumes, vegetable and oil crops, sugar crops, forage crops, fibre crops, medicinal crops and ornamentals. This work will be useful both as a reference work and a teaching aid to satisfy a wide range of workers. Every chapter has been written by an expert who has been involved in chromosome research on a particular plant material for many years.
