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Comprehensive reviews that, taken together, provide up-to-date coverage of a rapidly moving field* Features new and unpublished information* Integrates research in diverse organisms to present an overview of common threads in mechanisms of meiosis* Includes thoughtful consideration of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

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.

Biology for AP® courses covers the scope and sequence requirements of a typical two-semester Advanced Placement® biology course. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology for AP® Courses was designed to meet and exceed the requirements of the College Board’s AP® Biology framework while allowing significant flexibility for instructors. Each section of the book includes an introduction based on the AP® curriculum and includes rich features that engage students in scientific practice and AP® test preparation; it also highlights careers and research opportunities in biological sciences.

Black & white print. Concepts of Biology is designed for the typical introductory biology course for nonmajors, covering standard scope and sequence requirements. The text includes interesting applications and conveys the major themes of biology, with content that is meaningful and easy to understand. The book is designed to demonstrate biology concepts and to promote scientific literacy.

This book deals with reproduction of Amphibians belonging to three extant orders: Caecilians, Salamanders, Frogs and Toads. Separate chapters have been written for males and females; the chapters describe gonad structure and development, gametogenesis, urogenital connections, and reproductive tracts. The authors have provided a synthesis of the lit

A look into the phenomena of sex and reproduction in all organisms, taking an innovative, unified and comprehensive approach.

This new volume of Current Topics in Developmental Biology covers the area of gametogenesis, with contributions from an international board of authors. The chapters provide a comprehensive set of reviews covering such topics as germline stem cells, signaling modalities during oogenesis in mammals, and genomic imprinting as a parental effect established in mammalian germ cells. - Covers the area of gametogenesis - International board of authors - Provides a comprehensive set of reviews covering such topics as germline stem cells, signaling modalities during oogenesis in mammals, and genomic imprinting as a parental effect established in mammalian germ cells

The Cell: Biochemistry, Physiology, Morphology, Volume III: Meiosis and Mitosis covers chapters on meiosis and mitosis. The book discusses meiosis with regard to the meiotic behavior of chromosomes; the anomalous meiotic behavior in organisms with localized centromeres and in forms with nonlocalized centromeres; and the nature of the synaptic force. The text also describes the mechanism of crossing over; the relationship of chiasmata to crossing over and metaphase pairing; and the reductional versus equational disjunction. The process of mitosis and the physiology of cell division are also considered. The book further tackles the significance of cell division and chromosomes; the essential mitotic plan and its variants; the preparations for mitosis; and the transition period. The text also demonstrates the time course of mitosis; the mobilization of the mitotic apparatus; metakinesis; the metaphase; the mitotic apparatus; anaphase; telophase; cytokinesis; and the physiology of the dividing cell. Physiological reproduction; mitotic rhythms and experimental synchronization; and the blockage and stimulation of division are also encompassed. Biologists, microbiologists, zoologists, and botanists will find the book invaluable.

Sexual reproduction depends on meiosis, the specialized cell division that gives rise to gametes. During meiosis, two consecutive rounds of chromosome segregation follow one round of DNA replication to yield four haploid gametes from one diploid progenitor. In meiosis I, homologous chromosomes segregate and in meiosis 11, sister chromatids split. Much of the same cell cycle machinery controls mitosis and meiosis. However, segregation of homologous chromosomes in meiosis I and progression into meiosis 11 directly after meiosis I necessitate several modifications to the basic cell cycle machinery. In this thesis, I have investigated how cell cycle regulators function during gametogenesis. First, I show that the mitotic exit network, which is a signaling pathway essential for mitotic exit, is dispensable for the meiotic divisions, and in fact signals via a mechanism distinct from mitosis. Second, I present data that the Polo kinase Cdc5, which activates mitotic exit in budding yeast, has gained additional roles during meiosis 1. I show that CDC5 is required for the removal of cohesin from chromosome arms in meiosis I, which is a prerequisite for meiosis I segregation. Despite the central role of CDC5 in regulating meiosis I, CDC5 is dispensable during meiosis 11. In sum, understanding how cell cycle regulators control the specialized meiotic divisions has improved our understanding of how different cell division types are established.