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Topic: Classical genetics


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  Genetics - Wikipedia, the free encyclopedia
The word genetics was first applied to describe the study of inheritance and the science of variation by English scientist William Bateson in a letter to Adam Sedgewick, dated April 18, 1905.
The foundational discipline is population genetics which studies the distribution of and change in allele frequencies of genes under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and migration.
While molecular genetics studies the structure and function of genes at a molecular level, ecological genetics focuses on wild populations of organisms, and attempts to collect data on the ecological aspects of individuals as well as molecular markers from those individuals.
en.wikipedia.org /wiki/Genetics   (1528 words)

  
 Classical genetics - Wikipedia, the free encyclopedia
Classical genetics consists of the techniques and methodologies of genetics that predate the advent of molecular biology.
After the discovery of the genetic code and such tools of cloning as restriction enzymes, the avenues of investigation open to geneticists were greatly broadened.
Classical genetics is often contrasted with reverse genetics, and aspects of molecular biology are sometimes referred to as molecular genetics.
en.wikipedia.org /wiki/Classical_genetics   (165 words)

  
 Population genetics - Wikipedia, the free encyclopedia
Population genetics is the study of the distribution of and change in allele frequencies under the influence of the five evolutionary forces: natural selection, genetic drift, mutation, migration and nonrandom mating.
Population genetics was a vital ingredient in the modern evolutionary synthesis, its primary founders were Sewall Wright, J.
In practice, there are two bodies of evolutionary theory that exist in parallel, traditional population genetics operating in the genotype space and the biometric theory used in plant and animal breeding, operating in phenotype space.
en.wikipedia.org /wiki/Population_genetics   (698 words)

  
 Genetics -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-21)
Classical genetics consists of the techniques and methodologies of (The branch of biology that studies heredity and variation in organisms) genetics that predate the advent of (The branch of biology that studies the structure and activity of macromolecules essential to life (and especially with their genetic role)) molecular biology.
Molecular genetics employs the methods of both classical genetics (such as ((genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids) hybridization) and (The branch of biology that studies the structure and activity of macromolecules essential to life (and especially with their genetic role)) molecular biology.
Traits that are under the influence of a large number of genes are known as quantitative traits, and their mapping to a location on the (A threadlike body in the cell nucleus that carries the genes in a linear order) chromosome requires accurate phenotypic, pedigree and marker data from a large number of related individuals.
www.absoluteastronomy.com /encyclopedia/g/ge/genetics.htm   (2200 words)

  
 CLASSICAL GENETICS FACTS AND INFORMATION   (Site not responding. Last check: 2007-10-21)
Classical genetics consists of the techniques and methodologies of genetics that predate the advent of molecular_biology.
A key discovery of classical genetics in eukaryotes, was genetic_linkage.
Classical genetics is often contrasted with reverse_genetics, and aspects of molecular biology are sometimes referred to as molecular_genetics.
www.flowergods.com /classical_genetics   (143 words)

  
 Classical genetics   (Site not responding. Last check: 2007-10-21)
After the discovery of the genetic code and such tools of cloning as restriction enzyme s, the avenues of investigation open to geneticists were greatly broadened.
Genetics Combines the classical approaches of Mendelian genetics and cytogenetics with the recently developed discipline of molecular genetics.
Foundations of Classical Genetics Features a collection of publications, that can be browsed by author, by title, or by date of publication.
www.serebella.com /encyclopedia/article-Classical_genetics.html   (510 words)

  
 Classical genetics   (Site not responding. Last check: 2007-10-21)
Classical genetics consists of the techniques and methodologies of genetics that predate the advent of molecularbiology.
After the discovery of the genetic code and such tools of cloning as restrictionenzymes, the avenues of investigation open to geneticists were greatly broadened.
Classicalgenetics is often contrasted with reverse genetics, and aspects ofmolecular biology are sometimes referred to as moleculargenetics.
www.therfcc.org /classical-genetics-62440.html   (95 words)

  
 Genetics - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-21)
In modern research, genetics provides important tools in the investigation of the function of a particular gene, e.g.
Genes encode the information necessary for synthesizing proteins, which, in turn play a large role in influencing, although, in many instances, do not completely determine, the final phenotype of the organism.
Genomics depends on the availabilty of whole genome sequences, and compuational tools developed in the field of bioinformatics for analysis of large set of data.
www.lighthousepoint.us /project/wikipedia/index.php/Genetics   (1451 words)

  
 Genetics - Wikipedia, the free encyclopedia
Genetics determines much (but not all) of the appearance of organisms, including humans, and possibly how they act.
(Retroviruses, including influenza, oncoviruses and HIV, and many plant viruses, store their genetic information in RNA.) Manipulation of DNA can in turn alter the inheritance and features of various organisms.
Population, quantitative and ecological genetics are all very closely related subfields and also build upon classical genetics (supplemented with modern molecular genetics).
www.wikipedia.org /wiki/Genetics   (1528 words)

  
 HHMI's BioInteractive - What is chemical genetics?
The term chemical genetics indicates that the approach uses chemistry to generate the small molecules and that it is based on principles that are similar to classical genetic screens.
As the table illustrates, a classical forward genetic analysis starts with an outward physical characteristic (called a phenotype) of interest and ends with the identification of the gene or genes that are responsible for it.
In a genetic screen the activity of a protein is altered indirectly—by mutating its gene—but in chemical genetics this change is direct and occurs in real time (when the molecule is added).
www.hhmi.org /biointeractive/genomics/poster_a2.html   (1052 words)

  
 Genetics — A Chronology of Events - Part One.   (Site not responding. Last check: 2007-10-21)
The study of what is termed genetics today, beginning from when humans started keeping written records, initially consisted of a broad area of science roughly termed “generation” which effectually encompassed the study of a wide array of topics such as reproduction, embryology, development and differentiation, regeneration of parts and genetics proper.
With Mendel Classical Genetics begins and continues to flourish until it culminates in the discovery of the double helix structure of the DNA by James Dewey Watson, and Francis Crick in 1953.
Classical genetics can explain how genes are transmitted but it cannot yet explain how genes work or what their chemical composition is.
www.suite101.com /article.cfm/Mendelian_Inheritance/113531   (1200 words)

  
 The Science of Genetics   (Site not responding. Last check: 2007-10-21)
The next step in a genetic experiment is to obtain the correct experimental material for the experiments you which to perform.
For Classical Genetics, genetic stocks that contain the alternate alleles that you will be studying are required.
To determine what type of genetic stock or population is best for your specific experiments, it is necessary to understand the advantages and disadvantages of the different biological species that are used as test organisms.
www.ndsu.nodak.edu /instruct/mcclean/plsc431/science/scimeth2.htm   (241 words)

  
 Classical genetics   (Site not responding. Last check: 2007-10-21)
After the discovery of the genetic code and such tools of cloning as restriction enzymes the avenues of investigation open to were greatly broadened.
Classical genetics is often contrasted with reverse genetics and aspects of molecular biology are referred to as molecular genetics.
Classical Genetic Research and Its Legacy: The Mapping Cultures of Twentieth Century Genetics (Studies in the History of Science, Technology and Medicine, 19)
www.freeglossary.com /Classical_Genetics   (267 words)

  
 Classical Genetics Lectures   (Site not responding. Last check: 2007-10-21)
The study of the patterns and mechanisms of inheritance is genetics.
Classical genetics is patterns, molecular genetics is mechanisms.
Genetics problems: One of the mechanisms by which your understanding of genetics problems will be assessed is through problem solving.
www.lander.edu /RSfox/genclass.html   (8162 words)

  
 Mendel's Legacy: The Origin of Classical Genetics   (Site not responding. Last check: 2007-10-21)
Perhaps the most attractive aspect of Carlson's approach is the care with which he presents the evidence for specific genetic principles, and the arguments used by opponents of what are now elementary textbook principles.
Appreciating basic genetic principles is much enhanced by realizing the intellectual struggle involved in each piece of the puzzle.
He notes that genetics was a European stronghold in the Nineteenth century and became an American-led endeavor in the classical period from 1900 to 1930.
www.duchs.com /isbn/0879696753   (491 words)

  
 Ehlers-Danlos syndrome, classical type - Genetics Home Reference
The classical type is characterized by highly elastic, soft, and doughy skin; unusual scarring; and loose joints.
The classical type is one of the most common forms of Ehlers-Danlos syndrome.
In the rare cases caused by TNXB mutations, the condition has shown an autosomal recessive pattern of inheritance, which means two copies of the gene must be altered for a person to be affected by the disorder.
ghr.nlm.nih.gov /condition=ehlersdanlossyndromeclassicaltype;jsessio...   (832 words)

  
 Classical genetics (from heredity) --¬† Encyclop√¶dia Britannica
Genetic drift can result in genetic traits being lost from a population or becoming widespread in a population without respect to the survival or reproductive value of the alleles involved.
Genetic disorders range from minor traits, such as polydactyly (extra fingers or toes), to conditions that prove fatal.
Genetic Engineering is a relatively new science that involves the time extensive study and manipulation of cross-bred plants.
www.britannica.com /eb/article-50833   (826 words)

  
 Creation Essay 32
Geneticists study the chromosomes of organisms, the location of particular genes on the chromosomes, and changes (mutations) and rearrangements in the chromosomes and their genes which are transmitted by inheritance to succeeding generations.
Genetics relates the chromosomes and their genes to the inherited characteristics of organisms.
This is what we have termed "classical genetics." The new "molecular genetics" which is a part of molecular biology is a study of the chromosomes and the genes in the chromosomes at the level of their molecular structure and the actual arrangement of the atoms in the genes.
www.parentcompany.com /creation_essays/essay32.htm   (1365 words)

  
 Classical Lissencephaly Syndromes
Isolated lissencephaly sequence (ILS) consists of (1) classical lissencephaly grades 1-5 with grade 3 being most common, (2) normal facial appearance or subtle facial abnormalities which may differ slightly with mutations of different genes, and (3) severe developmental and neurologic sequela {Dobyns, 1992}{Dobyns, 1995}.
The current status of molecular genetics and testing for the classical lissencephaly syndromes is summarized in Table 2, and further details follow.
Based on the high frequency of visible deletions of 17p13.3 in children with MDS, molecular genetic studies were begun to search for submicroscopic deletions of this region in children with either MDS or ILS in whom chromosome analysis was normal.
www.lissencephaly.org /medical/info/classlis.htm   (4752 words)

  
 Genetics/Biotechnology Theme
In this 5-10 period web quest teaching unit, senior high students need to invent a genetically engineered product and then write a report answering a series of questions about their hypothetical new product (e.g., how they did it, how it impacts on the plant/animal's habitat and life systems, how it affects the environment, etc.).
In this web quest, students use the web to research their answer to the question: "Should genetically engineered food crops be specially labelled for consumers and why?" Classroom activities include drafting a law to address the labelling of such food and debating the issue.
Through the lesson, students will chart the genetic characteristics of two sets of parents and answer questions about the potential genetic makeup of their progeny.
www.cln.org /themes/genetics.html   (1372 words)

  
 class_genetics_lec
Genetic information is passed from cell to cell (asexual reproduction)) and from parents to offspring (sexual reproduction).
While an organism's genetic potential is determined by its genes, it is the interaction with the enviornment that determines what that organism becomes.
Genetics had its beginning in the work of an Austrian monk, Gregor Mendel (1822-1884).
www.personal.psu.edu /faculty/w/x/wxm15/Online/Classical%20Genetics/class_genetics_lec.htm   (5583 words)

  
 Classical Genetics   (Site not responding. Last check: 2007-10-21)
Classical genetics is based on cell division involving chromosomes, which consist of units of inheritance called genes.
The tenets of classical genetics can be applied to the inheritance of blood group genes.
The application of mendelian genetics to blood groups will be illustrated again later when some of the common blood group systems are discussed.
brie.medlabscience.med.ualberta.ca /de/genetics/70gen-classic.html   (591 words)

  
 Genetics - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-10-21)
For example, a single gene may produce multiple products, depending on how its transcription is regulated.
It was not until 1865 that Gregor Mendel first traced inheritance patterns of certain traits in pea plants and showed that they obeyed simple statistical rules.
WHO Classification of Tumours: Pathology and Genetics of Tumours of the Urinary System and Male Genital Organs (Who/IARC Classification of Tumours)
encyclopedia.worldsearch.com /genetics.htm   (1549 words)

  
 Terms in classical genetics
More importantly, the analysis tells you which mutants are typical (perhaps representative of a complete loss of gene product function, for example) and which are atypical (which may mean "interesting" or may mean "weird") for subsequent biochemical analysis.
A change in genotype refers to any known alterations in the DNA sequence from that which is arbitrarily referred to as wild type ("arbitrary" as it is whatever happened to be in the strain originally isolated from nature).
You should also become aware of the proper usage of genetic terminology and this will be sprinkled throughout the text.
www.bact.wisc.edu /Microtextbook/BactGenetics/geneticterms.html   (1403 words)

  
 Classical Genetics
Classical Genetics: Foundations - Collection of Classical Papers in Genetics.
A genetic cross yielding a 9:3:3:1 ratio of offspring, Predicting gametes of an SsYy plant, A SsYy x ssyy test cross, Offspring of a SsYy x ssyy test cross, Homozygous offspring of a dihybrid cross, Heterozygous offspring of a dihybrid cross, Homozygous offspring of a dihybrid cross, again, Exceptions to the 9:3:3:1 ratio of offspring?
Genetics: Beyond Mendel - Mendel's Rules of Genetics Do not Always Work, Alleles Are Not Always Dominant & Recessive, A Character May Be Determined by More Than One Gene, There May be More Than 2 Alleles in a Population.
www.infochembio.ethz.ch /links/en/biochem_klassgenetik.html   (449 words)

  
 ESP: Electronic Scholarly Publishing
Genetics in Context offers a dual timeline, with scientific events (especially those relevant to classical genetics) presented against those of general historical and cultural interest.
Funding for the expansion of the Classical Genetics section has been provided by the US Department of Energy as part of its commitment to supporting educational activities related to its Human Genome Project.
For a description of the ESP Classical Genetics project and a commentary on how it relates to public awareness and understanding of the Human Genome Project, read the NARRATIVE from the original ESP grant proposal to the DOE.
www.esp.org   (500 words)

  
 Classical (Mendelian) Genetics
Mitosis is the division of a nucleus to produce two genetically identical daughter nuclei.
Mules are strong and healthy because the chromosomes of the donkey and those of the horse carry very complementary kinds of genes, and the two sets of genetic influences interact very well, with little missing.
In genetics, this is a multi-layered chart showing males as little squares, females as little circles, and those of unknown gender is little diamonds.
www.cod.edu /people/faculty/fancher/genetics/ClassicalGenetics.htm   (4031 words)

  
 Contents
Classical genetics gave us the picture of genes aligned like beads on a string.
Microscopy revealed that these genetic chromosomes had a physical manifestation.
Finally, modified DNA can be put back into organisms to assess their function or to create modified organisms.
opbs.okstate.edu /~melcher/MG/MG01.html   (531 words)

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