Products related to Chromosomes:
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Evolution, Composition and Regulation of Supernumerary B Chromosomes
Supernumerary B chromosomes (Bs) are dispensable genetic elements found in thousands of species of plants and animals, and some fungi. Since their discovery more than a century ago, they have been a source of puzzlement, as they only occur in some members of a population and are absent from others. When they do occur, they are often harmful, and in the absence of “selfishness”, based on mechanisms of mitotic and meiotic drive, there appears to be no obvious reason for their existence. Cytogeneticists have long wrestled with questions about the biological existence of these enigmatic elements, including their lack of any adaptive properties, apparent absence of functional genes, their origin, sequence organization, and co-evolution as nuclear parasites. Emerging new technologies are now enabling researchers to step up a gear, to look enthusiastically beyond the previous limits of the horizon, and to uncover the secrets of these “silent” chromosomes. This book provides a comprehensive guide to theoretical advancements in the field of B chromosome research in both animal and plant systems.
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Abnormal Chromosomes : The Past, Present, and Future of Cancer Cytogenetics
Explore the past, present, and future of cancer cytogeneticsIn Abnormal Chromosomes: The Past, Present, and Future of Cancer Cytogenetics, globally renowned researchers Drs.Sverre Heim and Felix Mitelman deliver a state-of-the-art review of how cancer cytogenetic analyses have contributed to an improved understanding of tumorigenesis as well as to the diagnosis and treatment of cancer patients.The book also discusses how cytogenetics – the study of chromosomes - meets, interacts with, and cross-fertilizes other investigative technologies, including molecular somatic cell genetics. The book provides an impetus to think more deeply about the role chromosomes, and their abnormalities, play in health and disease, especially in neoplastic disorders.From which origins did cytogenetics develop? How did the finding of acquired chromosomal abnormalities in cells of leukemias and solid tumors influence our understanding of cancer as a biological process?How was information of this nature put to good use in the clinical management of cancer patients?Abnormal Chromosomes: The Past, Present, and Future of Cancer Cytogenetics offers readers: A thorough introduction to ancient theories of disease, the advent of cellular pathology, and how a scientific interest in chromosomes developedComprehensive exploration of the conceptual importance of Theodor Boveri and his somatic mutation theory of cancerA detailed chronological resume of cancer cytogenetic discoveries during the 20th centuryIn-depth discussions of the role of chromosome abnormalities, oncogenes, and tumor suppressor genes in leukemias, lymphomas, and solid tumors, together with a survey of what chromosome analyses have revealed about the clonal evolution of neoplastic cell populationsA discussion of the importance of pathogenetic classifications of neoplastic diseases, the role chromosome abnormalities play in this context, and which technological breakthroughs can be expected in chromosome-oriented cancer research Abnormal Chromosomes: The Past, Present, and Future of Cancer Cytogenetics was written for everyone with a scientific or clinical interest in cancer, especially how acquired chromosome abnormalities lead to neoplastic transformation.The book teaches how cytogenetic analyses contribute to a better understanding of tumorigenesis, but also how the finding of specific chromosome aberrations can be crucial for the diagnosis, prognosis, and management of cancer patients.
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Retro Rhinestone Carved Flower Sun Glasses Round Beach Tourism Sunglasses
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Technology and Social Transformations in Hospitality, Tourism and Gastronomy : South Asia Perspectives
This book explores the relationship between technology and social transformation in tourism, hospitality and gastronomy.It presents research and case studies, elaborating on benchmark practices adopted by tourism and hospitality professionals.In recent years, technology has transformed the tourism and hospitality industry; the chapters in this book cover areas such as guest experience and service quality, as well as operational areas such as housekeeping and waste management.Further social transformation in tourism is a result of drivers such as a growing interest in gastronomy and the use of social media; this is covered in the first part of the book.The second part outlines how communities may learn from these events.With contributions from academics, entrepreneurs, destination managers and government officials from the South Asia region, this book offers a real insight in to these areas of growing interest and provide a useful resource for those researching and studying within the areas of tourism development and hospitality.
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Are a chromatid chromosome and two chromatid chromosomes homologous chromosomes or a set of chromosomes?
A chromatid chromosome and two chromatid chromosomes are not homologous chromosomes, but rather a set of chromosomes. Homologous chromosomes are pairs of chromosomes that contain the same genes in the same order, one from each parent. In contrast, chromatid chromosomes are duplicated copies of a single chromosome that are joined together at the centromere. Two chromatid chromosomes refer to a duplicated chromosome in preparation for cell division.
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Are chromosomes unreliable?
Chromosomes are not inherently unreliable, as they are the structures that carry our genetic information and play a crucial role in cell division and inheritance. However, errors can occur during the process of chromosome replication and segregation, leading to genetic mutations and disorders. Additionally, environmental factors and lifestyle choices can also impact the stability and integrity of chromosomes. Overall, while chromosomes are essential for the functioning of our cells and the inheritance of genetic traits, they are not immune to errors and can be influenced by various factors.
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What is the difference between single chromosomes and double chromosomes?
Single chromosomes refer to a single strand of DNA that contains genetic information. In contrast, double chromosomes refer to a pair of identical chromosomes, one from each parent, that are joined together at the centromere. Single chromosomes are found in haploid cells, such as gametes, while double chromosomes are found in diploid cells, such as somatic cells. Double chromosomes allow for genetic diversity and the exchange of genetic material through processes such as meiosis and fertilization.
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What is the difference between chromosomes, chromatids, and double chromosomes?
Chromosomes are the structures within cells that contain genetic information. They are made up of DNA and proteins. Chromatids are the two identical copies of a chromosome that are formed during the process of DNA replication. Double chromosomes, on the other hand, refer to the paired chromosomes that are formed during cell division, with each chromosome consisting of two sister chromatids. In summary, chromosomes are the overall structures containing genetic material, chromatids are the individual copies of a chromosome, and double chromosomes are the paired chromosomes formed during cell division.
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Genetics 101 : From Chromosomes and the Double Helix to Cloning and DNA Tests, Everything You Need to Know about Genes
A clear and straightforward explanation of genetics in this new edition of the popular 101 series.Our genetic makeup determines so much about who we are, and what we pass on to our children—from eye color, to height, to health, and even our longevity.Genetics 101 breaks down the science of how genes are inherited and passed from parents to offspring, what DNA is and how it works, how your DNA affects your health, and how you can use your personal genomics to find out more about who you are and where you come from. Whether you’re looking for a better scientific understanding of genetics, or looking into your own DNA, Genetics 101 is your go-to source to discover more about both yourself and your ancestry.
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A History of Modern Tourism
Tourism is one of the largest industries in the world, yet leisure travel is more than just economically important.It plays a vital role in defining who we are by helping to place us in space and time.In so doing, it has aesthetic, medical, political, cultural, and social implications.However, it hasn't always been so. Tourism as we know it is a surprisingly modern thing, both a product of modernity and a force helping to shape it.A History of Modern Tourism is the first book to track the origins and evolution of this pursuit from earliest times to the present.From a new understanding of aesthetics to scientific change, from the invention of steam power to the creation of aircraft, from an elite form of education to family car trips to see national 'shrines,' this book offers a sweeping and engaging overview of a fascinating story not yet widely known.
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Tourism in Britain : An Illustrated History
Many of Britain’s best-known destinations have been open to visitors for several decades.In some cases, for several centuries. This book explores Britain’s rich cultural heritage and the sometimes peculiar, unusual and eccentric development of the nation’s tourism industry.It looks at some of the more surprising aspects of Britain’s best-known attractions and takes readers on a journey of exploration to some lesser-known places with some fascinating histories, offers new perspectives on popular knowledge and looks at the way that the visitors of yesteryear have shaped and influenced today’s tourist experiences. Illustrated throughout, the book features a fascinating selection of rarely seen photographs from the Victorian period to the early twenty-first century.
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Mushroom Gastronomy
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Does a homologous pair of chromosomes consist of two single-chromatid chromosomes or two double-chromatid chromosomes?
A homologous pair of chromosomes consists of two single-chromatid chromosomes. Each chromosome in the pair comes from one parent, and they carry the same genes in the same order, but may have different versions of those genes. During the S phase of the cell cycle, each single-chromatid chromosome replicates to form a double-chromatid chromosome, but these double-chromatid chromosomes do not pair up with each other during normal cell division.
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What is the difference between chromatids, chromosomes, and pairs of chromosomes?
Chromatids are two identical copies of a chromosome that are joined together at the centromere. Chromosomes are thread-like structures made of DNA and proteins that contain genetic information. Pairs of chromosomes refer to two homologous chromosomes, one inherited from each parent, that carry similar genes but may have different variations. In summary, chromatids are the duplicated copies of a single chromosome, chromosomes are the structures that contain genetic material, and pairs of chromosomes are homologous chromosomes inherited from each parent.
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What is the difference between double chromosomes and homologous double chromosomes?
Double chromosomes refer to a pair of identical chromosomes that are present in a diploid organism, one inherited from each parent. On the other hand, homologous double chromosomes are a pair of chromosomes that are similar in size, shape, and genetic content, but not identical. Homologous chromosomes carry the same genes in the same order, but may have different versions of those genes (alleles) due to genetic variation.
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How do chromosomes spiralize?
Chromosomes spiralize through a process called supercoiling. This occurs when the DNA double helix is twisted around itself, creating a more compact structure. Enzymes called topoisomerases are responsible for this process, helping to regulate the level of supercoiling in the chromosome. Supercoiling allows the long DNA molecule to be packaged into the small space of the cell nucleus, and also plays a role in regulating gene expression and DNA replication.
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