The Chromosome Complement, By B. John and K.R. Lewis
Author | : Bernard John |
Publisher | : |
Total Pages | : 206 |
Release | : 1968 |
Genre | : Karyotypes |
ISBN | : |
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Author | : Bernard John |
Publisher | : |
Total Pages | : 206 |
Release | : 1968 |
Genre | : Karyotypes |
ISBN | : |
Author | : Bernard John |
Publisher | : Springer Science & Business Media |
Total Pages | : 211 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3709157811 |
material can serve both autocatalytic and heterocatalytic functions. Thus not only is it unique in itB capacity for self-replication but its base sequence determines the specificity of proteins. And enzyme proteins are immediately responsible for the peripheral metabolism which enables the organism to impose its own kind of order on the raw materials it absorbs. The course of development is determined not only by the nature of the genetic material but by its over-all amount and the relative frequency of the different functional units. Differential rates of epigenetic activity matter also. In theory, therefore, differential development within or even between individuals could be determined by the differential replication of the various genetic elements or by their differential activity. And further variation could arise by the differential transmission of these elements between cells. Indeed it would appear that all these possibilities are exploited by living systems. If like is to beget like, however, any genetic change which occurs during development must be undone, or else germinal units preserved from change must be set aside. As far as is known, genetic changes, even those involving only quantity or relative amounts, are reversible to only a very limited extent so that a change once done cannot be undone. Consequently genetic changes during the development of presumptive germ-lines are either non existant or minor and confined to a small class of un aggregated deter minants.
Author | : |
Publisher | : |
Total Pages | : 794 |
Release | : 1968 |
Genre | : Protoplasm |
ISBN | : |
Author | : |
Publisher | : Academic Press |
Total Pages | : 417 |
Release | : 1968 |
Genre | : Science |
ISBN | : 0080585604 |
International Review of Cytology
Author | : J. Schulz-Schaeffer |
Publisher | : Springer Science & Business Media |
Total Pages | : 453 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 1461260604 |
Since 1961 the author has taught a course in Cytogenetics at Montana State University. Undergraduate and graduate stu dents of Biology, Chemistry, Microbiology, Animal and Range Science, Plant and Soil Science, Plant Pathology and Veterinary Science are enrolled. Therefore, the subject matter has been pre sented in an integrated way to correlate it with these diverse disciplines. This book has been prepared as a text for this course. The most recent Cytogenetics text was published in 1972, and rapidly developing research in this field makes a new one urgently needed. This book includes many aspects of Cytogenetics and related fields and is written for the college student as well as for the researcher. It is recommended that the student should have taken preparatory courses in Principles of Genetics and Cytol ogy. The content is more than is usually taught during one quar ter of an academic year, thus allowing an instructor to choose what he or she would like to present to a class. This approach also allows the researcher to obtain a broad exposure to this field of biology. References are generously supplied to stimulate orig inal reading on the subject and to give access to valuable sources. The detailed index is intended to be of special assistance to researchers.
Author | : Daniel Branton |
Publisher | : Springer Science & Business Media |
Total Pages | : 78 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3709156009 |
Author | : Bernard John |
Publisher | : Springer Science & Business Media |
Total Pages | : 132 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3709155908 |
neoessity for making it. Yet, clearly, the problem of development is largely one of filling "the vacuum between determinant and character" (DARLINGTON 1951). Nowadays the chromosome theory can be presented in much greater detail and with utter confidence, but its two main features remain the same. However, while the role of the chromosomes in heredity and development has been appreciated for a long time, the manner in which they perform their genetic and epigenetic functions has become amenable to critical investigation only in recent years. There is, therefore, still an unmistakable tendency to think of chromosomes in terms of the discrete threads of cell division and, in keeping with this conception, the chromosome cycle is gen erally considered in relation to the microscopically visible changes in morphology which occur during the mechanically active phases of mitosis and meiosis. Chromosome phenotype, however, changes not only during division but throughout the cell cycle. The changes which occur during interphase are, of course, scarcely revealed in morphological modifications of the restless "resting" nucleus. Consequently they are less obvious and correspondingly less amenable to investigation. This accounts for the concentration on the countable karyotype, with its visible properties of pairing and pycnosity, and the measurable movements of separation and segregation.
Author | : F. D'amato |
Publisher | : CUP Archive |
Total Pages | : 314 |
Release | : 1977-09-08 |
Genre | : Science |
ISBN | : 9780521215084 |
Author | : |
Publisher | : |
Total Pages | : 72 |
Release | : 1992 |
Genre | : |
ISBN | : |
Author | : S. Srivastava |
Publisher | : Springer Science & Business Media |
Total Pages | : 411 |
Release | : 2006-01-16 |
Genre | : Science |
ISBN | : 1402032137 |
The genesis of the volume, Plant Biotechnology and Molecular Markers, has been the occasion of the retirement of Professor Sant Saran Bhojwani from the Department of Botany, University of Delhi. For Professor Bhojwani, retirement only means relinquishing the chair as being a researcher and a teacher which has always been a way of life to him. Professor Bhojwani has been an ardent practitioner of modern plant biology and areas like Plant Biotechnology and Molecular Breeding have been close to his heart. The book contains original as well as review articles contributed by his admirers and associates who are experts in their area of research. While planning this contributory book our endeavour has been to incorporate articles that cover the entire gamut of Plant Biotechnology, and also applications of Molecular Markers. Besides articles on in vitro fertilization and micropropagation, there are articles on forest tree improvement through genetic engineering. Considering the importance of conservation of our precious natural wealth, one article deals with cryopreservation of plant material. Chapter on molecular marker considers DNA indexing as markers of clonal fidelity of in vitro regenerated plants and prevention against bio-piracy. A couple of write-ups also cover stage-specific gene markers, DNA polymorphism and genetic engineering, including raising of stress tolerant plants to sustain productivity and help in reclamation of degraded land.