Evolution by Gene Duplication PDF Download
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Author: Susumu Ohno
Publisher: Springer Science & Business Media
ISBN: 364286659X
Category : Medical
Languages : en
Pages : 171
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Book Description
It is said that "necessity is the mother of invention". To be sure, wheels and pulleys were invented out of necessity by the tenacious minds of upright citi zens. Looking at the history of mankind, however, one has to add that "Ieisure is the mother of cultural improvement". Man's creative genius flourished only when his mind, freed from the worry of daily toils, was permitted to entertain apparently useless thoughts. In the same manner, one might say with regard to evolution that "natural selection mere(y tnodifted, while redundanry created". Natural selection has been extremely effective in policing alleHe mutations which arise in already existing gene loci. Because of natural selection, organisms have been able to adapt to changing environments, and by adaptive radiation many new species were created from a common ancestral form. Y et, being an effective policeman, natural selection is extremely conservative by nature. Had evolution been entirely dependent upon natural selection, from a bacterium only numerous forms of bacteria would have emerged. The creation of metazoans, vertebrates and finally mammals from unicellular organisms would have been quite impos sible, for such big leaps in evolution required the creation of new gene loci with previously nonexistent functions. Only the cistron which became redun dant was able to escape from the relentless pressure of natural selection, and by escaping, it accumulated formerly forbidden mutations to emerge as a new gene locus.
Author: Susumu Ohno
Publisher: Springer Science & Business Media
ISBN: 364286659X
Category : Medical
Languages : en
Pages : 171
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Book Description
It is said that "necessity is the mother of invention". To be sure, wheels and pulleys were invented out of necessity by the tenacious minds of upright citi zens. Looking at the history of mankind, however, one has to add that "Ieisure is the mother of cultural improvement". Man's creative genius flourished only when his mind, freed from the worry of daily toils, was permitted to entertain apparently useless thoughts. In the same manner, one might say with regard to evolution that "natural selection mere(y tnodifted, while redundanry created". Natural selection has been extremely effective in policing alleHe mutations which arise in already existing gene loci. Because of natural selection, organisms have been able to adapt to changing environments, and by adaptive radiation many new species were created from a common ancestral form. Y et, being an effective policeman, natural selection is extremely conservative by nature. Had evolution been entirely dependent upon natural selection, from a bacterium only numerous forms of bacteria would have emerged. The creation of metazoans, vertebrates and finally mammals from unicellular organisms would have been quite impos sible, for such big leaps in evolution required the creation of new gene loci with previously nonexistent functions. Only the cistron which became redun dant was able to escape from the relentless pressure of natural selection, and by escaping, it accumulated formerly forbidden mutations to emerge as a new gene locus.
Author: Francis Chidley Rohlehr Pollard
Publisher:
ISBN:
Category : Child welfare
Languages : en
Pages : 208
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Book Description
Author:
Publisher:
ISBN:
Category : Accounting
Languages : en
Pages : 1448
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Book Description
Author: Katharina Dittmar
Publisher: John Wiley & Sons
ISBN: 1118148096
Category : Science
Languages : en
Pages : 350
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Book Description
Gene duplication has long been believed to have played a major role in the rise of biological novelty through evolution of new function and gene expression patterns. The first book to examine gene duplication across all levels of biological organization, Evolution after Gene Duplication presents a comprehensive picture of the mechanistic process by which gene duplication may have played a role in generating biodiversity. Key Features: Explores comparative genomics, genome evolution studies and analysis of multi-gene families such as Hox, globins, olfactory receptors and MHC (immune system) A complete post-genome treatment of the topic originally covered by Ohno's 1970 classic, this volume extends coverage to include the fate of associated regulatory pathways Taps the significant increase in multi-gene family data that has resulted from comparative genomics Comprehensive coverage that includes opposing theoretical viewpoints, comparative genomics data, theoretical and empirical evidence and the role of bioinformatics in the study of gene duplication This up-to-date overview of theory and mathematical models along with practical examples is suitable for scientists across various levels of biology as well as instructors and graduate students.
Author:
Publisher:
ISBN:
Category : Law reports, digests, etc
Languages : en
Pages : 1718
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Book Description
Author: Pamela Lewis
Publisher: ISTE (Interntl Soc Tech Educ
ISBN: 9781564842244
Category : Computers
Languages : en
Pages : 214
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Book Description
Step-by-step instructions for using spreadsheets to teach students in kindergarten through sixth grade. Lessons cover a variety of subject areas: language arts, social studies, science, music, and mathematics.
Author: Valentine Korah
Publisher:
ISBN:
Category : Antitrust law
Languages : en
Pages : 1180
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Book Description
Author: New York (State). Court of Appeals.
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 1104
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Book Description
Volume contains: need index past index 6 (People v. Regan) need index past index 6 (People v. Regan) need index past index 6 (People v. Regan) need index past index 6 (Perlman v. Israel & Sons Co., Inc.) need index past index 6 (Perlman v. Israel & Sons Co., Inc.) need index past index 6 (Perlman v. Israel & Sons Co., Inc.) need index past index 6 (Perlman v. Israel & Sons Co., Inc.) need index past index 6 (Popkin v. Jewish Young Men's & Women's Ass'n. of Rochester) need index past index 6 (Popkin v. Jewish Young Men's & Women's Ass'n. of Rochester) need index past index 6 (Popkin v. Jewish Young Men's & Women's Ass'n. of Rochester) need index past index 6 (Matter of Price) need index past index 6 (Matter of Price) need index past index 6 (Matter of Price) need index past index 6 (Matter of Price) need index past index 6 (Matter of Price) need index past index 6 (Matter of Price) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.) need index past index 6 (Ranney v. Habern Realty Corp.)
Author:
Publisher:
ISBN:
Category : Law reports, digests, etc
Languages : en
Pages : 1400
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Book Description
Author: Paul Werstine
Publisher: Cambridge University Press
ISBN: 1139851675
Category : Literary Criticism
Languages : en
Pages : 447
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Book Description
Early Modern Playhouse Manuscripts and the Editing of Shakespeare argues for editing Shakespeare's plays in a new way, without pretending to distinguish authorial from theatrical versions. Drawing on the work of the influential scholars A. W. Pollard and W. W. Greg, Werstine tackles the difficult issues surrounding 'foul papers' and 'promptbooks' to redefine these fundamental categories of current Shakespeare editing. In an extensive and detailed analysis, this book offers insight into the methods of theatrical personnel and a reconstruction of backstage practices in playhouses of Shakespeare's time. The book also includes a detailed analysis of nineteen manuscripts and three quartos marked up for performance - documents that together provide precious insight into how plays were put into production. Using these surviving manuscripts as a framework, Werstine goes on to explore editorial choices about what to give today's readers as 'Shakespeare'.
