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This second of two volumes on Plant Genome Diversity provides, in 20 chapters, insights into the structural evolution of plant genomes with all its variations. Starting with an outline of plant phylogeny and its reconstruction, the second part of the volume describes the architecture and dynamics of the plant cell nucleus, the third examines the evolution and diversity of the karyotype in various lineages, including angiosperms, gymnosperms and monilophytes. The fourth part presents the mechanisms of polyploidization and its biological consequences and significance for land plant evolution. The fifth part deals with genome size evolution and its biological significance. Together with Volume I, this comprehensive book on the plant genome is intended for students and professionals in all fields of plant science, offering as it does a convenient entry into a burgeoning literature in a fast-moving field.
Cet ouvrage propose un panorama de la génétique moléculaire végétale et des évolutions dans ce domaine. Il présente une description des génomes végétaux et aborde les aspects les plus récents de la régulation de leur expression. Les méthodologies qui ont conduit à ces connaissances sont présentées telles que la transgenèse, la cartographie moléculaire et les méthodes de mutagenèse. Pédagogique et largement illustré, ce livre s'adresse aux étudiants des universités, aux enseignants en biologie et biotechnologies, voire à toute personne ayant quelques bases en biologie générale.
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.
SHORTLISTED FOR THE 2018 BAILLIE GIFFORD PRIZE FOR NON-FICTION She Has Her Mother’s Laugh presents a profoundly original perspective on what we pass along from generation to generation. Charles Darwin played a crucial part in turning heredity into a scientific question, and yet he failed spectacularly to answer it. The birth of genetics in the early 1900s seemed to do precisely that. Gradually, people translated their old notions about heredity into a language of genes. As the technology for studying genes became cheaper, millions of people ordered genetic tests to link themselves to missing parents, to distant ancestors, to ethnic identities . . . But, award-winning science writer Carl Zi...
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La reproduction a fait l’objet de nombreuses recherches et s’est enrichie de nouveaux outils d’exploration du vivant qui ont bouleversé nos connaissances des mécanismes et renouvelé les concepts. Plus de cent spécialistes français et étrangers de renom ont contribué à cet ouvrage de référence qui synthétise les connaissances actuelles sur la reproduction et leurs applications chez l’animal et l’homme.
Charles Darwin desempeñó un papel crucial a la hora de convertir la herencia en una cuestión científica y, sin embargo, fracasó estrepitosamente a la hora de responderla. El nacimiento de la genética, a principios del siglo XX, pareció hacer precisamente eso. Poco a poco la gente tradujo sus antiguas nociones sobre la herencia a un lenguaje de genes. A medida que la tecnología para el estudio de los genes se abarató, millones de personas pidieron pruebas genéticas para relacionarse con padres desaparecidos, con antepasados lejanos, con identidades étnicas... Pero, escribe Zimmer, "cada uno de nosotros es portador de una amalgama de fragmentos de ADN, cosidos a partir de algunos de...