8 products were found matching your search for Meiosis in 2 shops:

Meiosis Video Quiz - DVD 743452534326

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.

Homologous recombination is important in various aspects of DNA metabolism, including damage repair, replication, telomere maintenance, and meiosis, and yeast genetics has successfully provided a framework for the mechanism of homologous recombination. Divided into four convenient sections, DNA Recombination: Methods and Protocols covers recent techniques that best utilize the advantages of the yeast system, prescribing to the belief that yeast will keep serving as a great model organism to study homologous recombination. Chapters have also been included for such exceptions as the group of genes involved in recombination that are found solely in higher eukaryotes, such as BRCA2. And looking forward, a necessary step in the direction of understanding the homologous recombination process is to isolate the machine and let it work in a test tube.  Understanding the design by studying the appearance and behavior of the machinery as a single molecule will be an important milestone toward understanding the mechanism of action of the machinery. Techniques covering these topics have also been included.  Written in the successful Methods in Molecular Biology™ series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and easily accessible, DNA Recombination: Methods and Protocols serves as an ideal guide to scientists of all backgrounds with its well-honed methodologies and strives to bring the reader to the next level of understanding regarding this vital subject.

Homologous recombination is important in various aspects of DNA metabolism, including damage repair, replication, telomere maintenance, and meiosis, and yeast genetics has successfully provided a framework for the mechanism of homologous recombination. Divided into four convenient sections, DNA Recombination: Methods and Protocols covers recent techniques that best utilize the advantages of the yeast system, prescribing to the belief that yeast will keep serving as a great model organism to study homologous recombination. Chapters have also been included for such exceptions as the group of genes involved in recombination that are found solely in higher eukaryotes, such as BRCA2. And looking forward, a necessary step in the direction of understanding the homologous recombination process is to isolate the machine and let it work in a test tube.  Understanding the design by studying the appearance and behavior of the machinery as a single molecule will be an important milestone toward understanding the mechanism of action of the machinery. Techniques covering these topics have also been included.  Written in the successful Methods in Molecular Biology™ series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and easily accessible, DNA Recombination: Methods and Protocols serves as an ideal guide to scientists of all backgrounds with its well-honed methodologies and strives to bring the reader to the next level of understanding regarding this vital subject.

Embryogenesis is an unusual book in that it brings together a highly illustrated, practical embryology book in simple language, perfect for health practitioners, with a fascinating read on the history and philosophy of biological science. It discusses the various stages of embryonic development (meiosis, fertilization, blastula development, and gastrulation, and then the embryology of each of the human organs and organ systems in detail). It puts each of them in context, both in terms of its phylogeny: the evolutionary trajectory of cell-organized systems on Earth, and its ontogeny: the formation of individual organisms in the modern world. There are 24 color plates, many of them commissioned uniquely for this volume, and several hundred black and white illustrations. The book is 950 pages hardcover, 8-1/2 by 10.Chapters include: The Original Earth; The Materials of Life; The First Beings; The Cell; The Genetic Code; Sperm and Egg; Fertilization; The Blastula; Gastrulation; Morphogenesis; Biological Fields; Chaos, Fractals, and Deep Structure; Ontogeny and Phylogeny; and Biotechnology. The Origin of the Nervous System; The Evolution of Intelligence; Neurulation and the Human Brain; Organogenesis; The Musculoskeletal and Hematopoietic Systems; Mind; The Origin of Sexuality and Gender. Healing; Transsexuality, Intersexuality, and the Cultural Basis of Gender; Self and Desire; Cosmogenesis and Mortality

THE definitive genetics lab manual for over 50 years, this user-friendly volume stresses classical genetics, but includes some of the recent advances related to molecular and human genetics as well. Drosophila and Maize Experiments in Genetics: Monohybrid Crosses; Dihybrid Crosses. Cell Reproduction: Mitosis. Meiosis in Animals: Oogenesis and Spermatogenesis. Meiosis in Angiosperms: Microsporogenesis and Megasporogenesis. Polytene Chromosomes from Drosophila Salivary Glands. Sex Chromosomes and Gene Transmission. The Sex Check: A Study of Sex Chromatin in Human Cells. Human Chromosomes. Linkage and Crossing Over. Genetics of Ascospore Color in Sordaria: An Investigation of Linkage and Crossing Over Using Tetrad Analysis. Open-Ended Experiments Using Drosophila: Locating a Mutant Gene in Its Chromosome. Isolation of DNA. Restriction Endonuclease Digestion and Gel Electrophoresis of DNA. Amplification of DNA Polymorphisms by Polymerase Chain Reaction (PCR) and DNA Fingerprinting. Transformation of Escherichia coli. Gene Action: Synthesis of ... b-Galactosidase in Escherichia coli. Chromatographic Characterization of Drosophila melanogaster Mutants. Bacterial Mutagenesis. Gene Recombination in Phage. Polygenic Inheritance: Fingerprint Ridge Count. Population Genetics: The Hardy-Weinberg Principle; The Effects of Selection and Genetic Drift. Applied Human Genetics. For anyone interested in hands-on genetics work.

This book explores the relationship between various types of reproduction and the evolutionary process. Starting with the concept of meiosis, George C. Williams states the conditions under which an organism with both sexual and asexual reproductive capacities will employ each mode. He argues that in low-fecundity higher organisms, sexual reproduction is generally maladaptive, and persists because there is no ready means of developing an asexual alternative. The book then considers the evolutionary development of diverse forms of sexuality, such as anisogamy, hermaphroditism. and the evolution of differences between males and females in reproductive strategy. The final two chapters examine the effect of genetic recombination on the evolutionary process itself.

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.