61. Population Genetics Breeding population genetics is not really a new discipline, it just seems that way population genetics is a tool for looking at an entire population or breed. http://www.canine-genetics.com/pgbreed.htm

The Canine Diversity Project Population Genetics and Breeding by John Armstrong Early genetics This does not imply an endorsement of random mating, but was simply a starting point for the eventual development of equations to describe other situations. Most natural populations do not follow these rules. In nature, selection is often harsh, and most animals do not practice random mating. In many species that live in packs or herds, only the dominant male may breed and competition for that spot may be intense. Otherwise, the most common practice is probably assortative mating, where mates are chosen that have similar qualities (size, temperament, etc.) or are not closely related (negative assortative mating). How they decide on the latter is still being determined, but recognition of relatives probably depends on pheromones to a large extent. Genetics without color In the beginning, all geneticists held to much the same beliefs, or "model"– that there was one, and only one, good (or "wild-type") version of each gene. There were also a few nasty recessive mutants that would occasionally surface. They didn't really expect to find a large amount of diversity for most genes. They lived in a black-and-white world where genes were like light switches – either on or off, no in-between. As most of the bad mutations appeared to be recessive, good breeding was reduced to finding ways of efficiently identifying those carrying "degeneracies". Faith in inbreeding as a method for breeding the perfect individual was reinforced by various authors:

62. Population Genetics population genetics. Purpose. What percentage of a population have inherited traits such as attached earlobes, widow s peak, and hitchhiker s thumb? http://www2.gsu.edu/~mstnrhx/traits2.htm

Population Genetics Purpose: What percentage of a population have inherited traits such as attached earlobes, widow's peak, and hitch-hiker's thumb? Do the percentages your class post in this collaborative project display the expected genetic statistics? This project is designed by Science Educators from Georgia State University who realize the need to collaboratively collect and analyze scientific data on a broader scope. The particpants may be science educators, or educators from other disciplines...since we all have inherited traits that are recognizeable easily described, and interesting to analyze. Procedure: We will observe and compile data on: Attached Ear lobes Cheek Dimples Tongue Curling Hitch Hiker's Thumb ... Cleft Chin Handclasping Widow's peak Right or Left Handed We will use the Inherited Traits Worksheet to record our observations in pairs, and then compile data for groups of ten. We will then post our data on the CLEO Online Collaborative Project.

63. Welcome On 7 Th World Congress On Genetics Applied To Livestock Production Web S Conference held every fours years discussing the state of the art in theory of quantitative genetics and population genetics. Includes program, instruction to authors, and registration. http://wcgalp.toulouse.inra.fr/

64. Science -- Sign In Modeling population genetics. Ellen Quardokus*. population genetics relies heavily on mathematical modeling to make quantitative predictions about the http://www.sciencemag.org/cgi/content/full/288/5465/458

You do not have access to this item: Full Text : Quardokus, Modeling Population Genetics, Science You are on the site via Free Public Access. What content can I view with Free Public Access If you have a personal user name and password, please login below. SCIENCE Online Sign In Options For Viewing This Content User Name Password this computer. Help with Sign In If you don't use cookies, sign in here Join AAAS and subscribe to Science for free full access. Sign Up More Info Register for Free Partial Access including abstracts, summaries and special registered free full text content. Register More Info Regain Access to a recent Pay per Article purchase Need More Help? Can't get past this page? Forgotten your user name or password? AAAS Members activate your FREE Subscription

65. Population Genetics population genetics. The HardyWeinberg Law. As you know by now, random mutations occasionally occur within any population of organisms. http://biology.clc.uc.edu/courses/bio303/population genetics.htm

Protocol POPULATION GENETICS The Hardy-Weinberg Law As you know by now, random mutations occasionally occur within any population of organisms. Each mutation makes the organism in which it occurs more or less fit — more or less suited to its particular environment. Mutations may be beneficial neutral , or disadvantageous depending on the selective pressure put on the organism by the environment in which it is living. Due to that mutation, the organism may be better or worse able to compete for resources, or in other words, natural selection is acting on that organism. Recall that during the coal-powered Industrial Revolution in England, the melanistic adaptation Given a suitable environment and enough elapsed time following the original mutation, the gene pool of a specific population will usually reach some equilibrium point where the proportions of the various alleles become stable. Thus, initially, we need to make several background assumptions when examining the percentages of alleles in a population: Reproduction/mating is random (this is usually not the case in humans).

66. Human Genetics - Population Genetics Although one may never use the calculations of population genetics in medical Persons have mistakenly applied population genetics to prove race http://www.uic.edu/classes/bms/bms655/lesson13.html

HUMAN GENETICS for 1st YEAR STUDENTS POPULATION GENETICS INTRODUCTION Population genetics is also the most widely misused area of human genetics, sometimes bordering on "vigilante genetics," a term coined by Newton Morton. Persons have mistakenly applied population genetics to "prove" race superiority for intelligence and aptitudes, and have misused it in eugenics. As an educated and, I hope, a respected member of your community you must be alert to "vigilante genetics." Population genetics is concerned with gene and genotype frequencies, the factors that tend to keep them constant, and the factors that tend to change them in populations. It is largely concerned with the study of polymorphisms. It directly impacts counseling, forensic medicine, and genetic screening. GENE AND GENOTYPE FREQUENCIES CODOMINANT ALLELES Consider a population of 1000 individuals all typed for the simplest test at the MN blood group locus. At its most simplistic form this locus can be reduced to a codominant system with two alleles M and N. (In reality it is considerably more complex than this but this simple form will suffice for our examples.) Every individual in the population will be either M (having two M alleles), MN (heterozygous), or N (having two N alleles). Suppose the blood typing results were as follows: 300 M individuals, 600MN individuals, and 100 N individuals. You probably want to ask, "What is the gene frequency of the M allele in the above population of 1000 individuals?" I'm glad you're interested!

67. Donach Plant Breeding Academy Education, comment and research in plant breeding based on natural genetics, including quantitative population genetics. http://www.donach.ac.nz/

Donach Plant Breeding Academy An independent Academic Centre for Research and Education in Plant Breeding based on Natural Genetics Dr Ian L. Gordon Ph.D.( Syd. ), M.Agr.Sc.( Qld ), Q.D.A.(Hons)( Q.A.H.S.C. Principal professing Heredity and Quantitative Genetics Professional: genovir@donach.ac.nz Consultancy: genopro@donach.ac.nz Mail: PO Box 8018, Hokowhitu, Palmerston North, 5331, New Zealand Current Research: Polygenic genotypic variance with epistasis Current Research: Quantitative genetics of dihaploids Latest Publication: Patterns of variation in flowering and seed set of meadowfoam Latest Publication: Refinements to the partitioning of the inbred genotypic variance Current Commentary: Discard the Blinkers Publctns Comment 25 February 2004 Commentary Discard the Blinkers It is necessary still to focus on the inheritance of phenotypes, because sexual gene exchange and the observed properties of whole organisms remain the central issues. This is true for selection, evolution, ecology, and human families. Such natural genetics ( ie.

68. The Value Of Population Genetics To The Breeder NetPets Your Complete Internet Pet Connection For Dogs. http://www.netpets.com/dogs/reference/genetics/popgen.html

The Value of Population Genetics to the Breeder by John Armstrong As a breeder, you are a practicing geneticist. To breed effectively you need to know something about genetic principles. (Would you sit down to a bridge game expecting to win without any knowledge of the rules?) What is often called "Mendelian genetics" deals with the outcome of specific crosses. Population genetics deals with the distribution of alleles in a population and the effects of mutation, selection, inbreeding, etc. on this distribution. A knowledge of both is critical not only to your own success, but also to the survival of your breed. Once-upon-a-time, many geneticists believed that there were only two alternatives for a gene - "good" alleles that functioned normally and "bad" alleles that didn't. If things were this simple, then the task of the geneticist-breeder would be simplified to one of identifying the bad alleles and trying to eliminate them from the population. Such a simplistic model could be modified to allow for different "good" alleles, but it should not matter whether you have one or another. These early geneticists expected to find little genetic variability in a population. The majority of individuals were expected to be homozygous for the good allele for most genes. With the advent of modern biochemical and molecular tools, geneticists studying populations found far more variability (diversity) than they had expected. There are a number of possible reasons for this, and even the experts are not in total agreement on the most likely reason(s). However, geneticists have also discovered that populations lacking genetic diversity often have significant problems and are at greater risk from disease and other changes in their environment. The conclusion is that genetic diversity is desirable for the health and long-term survival of a population.

69. Human Population Genetics Population and Evolutionary Genetics (by Phil McClean at North Dakota State University). population genetics Home Page (by Larry Leamy at UNC Charlotte) http://watson.hgen.pitt.edu/~dweeks/teaching.html

Human Population Genetics Links Web-based tools Odds Ratios and Relative Risks (JavaScript) Courses and Outlines: Population and Evolutionary Genetics (by Phil McClean at North Dakota State University) Population Genetics Home Page (by Larry Leamy at UNC Charlotte) Genetic Drift (By Larry Leamy) Inbreeding (By Larry Leamy) Effective Population Size (By Larry Leamy) Evolution and Population Genetics Educational Database Population Genetics Links Educational Software: Populus Java Population Genetics Simulations Simulation Software: Populus POPSIM Genoom SOCSIM Demographic Computer Microsimulation Program National Micropopulation Simulation Resource last modified: document.write(document.lastModified);

70. Nearctica - Evolution - Population Genetics population genetics Question Page. Michael Wooten, Auburn University. Here s your chance to ask an expert a question about population genetics or genetics. http://www.nearctica.com/evolve/popgen.htm

Population Genetics Special Segments Butterflies of North America Conifers of North America Eastern Birds List of N.A. Insects Home Eastern Wildflowers General Topics Natural History Ecology Family Environment Evolution Home Education Home Conservation Geophysics Paleontology Commercial Organizations Hardy-Weinberg Equation p + 2pq + q Buy Books about Population Genetics Evolution and Selection of Quantitative Traits . Bruce Walsh, University of Arizona. This is volume 2 of a two volume work on quantitative genetics and deals with population genetics. These pages are preliminary drafts for a book and will probably only be around until the book is published. The chapters are arranged as a series of Adobe Acrobat files (pdf). The material is extremely technical, but the book is an incredible resource for the web. Highly recommended. Population Genetics Question Page . Michael Wooten, Auburn University. Here's your chance to ask an expert a question about population genetics or genetics. Population Genetics, Random Genetic Drift

71. RBGE Population Genetics The work of the population genetics Group encompasses three overlapping themes This work spans the disciplines of population genetics and phylogenetics http://www.rbge.org.uk/rbge/web/science/research/conservation/popgen.jsp

72. Population Genetics: Definition And Much More From Answers.com population genetics n. (used with a sing. verb) The branch of science that deals with the statistical analysis of the inheritance and prevalence of. http://www.answers.com/topic/population-genetics

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Dictionary Science Medical Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping population genetics Dictionary population genetics n. (used with a sing. verb) The branch of science that deals with the statistical analysis of the inheritance and prevalence of genes in populations. var tcdacmd="cc=edu;dt"; Science population genetics The study of the genetic composition of populations in order to understand the evolutionary forces that select for a particular gene Medical population genetics n. The branch of genetics that deals with the genetic makeup of populations. Wikipedia population genetics 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 . It also takes account of population subdivision and population structure in space. As such, it attempts to explain such phenomena as adaptation and speciation . Population genetics was a vital ingredient in the modern evolutionary synthesis , its primary founders were Sewall Wright J. B. S. Haldane

73. Lb5pg1 LABORATORY 5. population genetics THE HARDYWEINBERG THEOREM With the progress in population genetics in the 1930 s, Mendelism and Darwinism were http://io.uwinnipeg.ca/~simmons/lb5pg1.htm

LABORATORY 5 POPULATION GENETICS THE HARDY-WEINBERG THEOREM Objectives of the lab: 1. To explain the Hardy-Weinberg equilibrium in terms of allelic and genotypic frequencies and relate these to the expression (p + q)2 = p2 + 2pq + q2 = 1. 2. Describe the conditions necessary to maintain the Hardy-Weinburg equilibrium. 3. Use the bead model to demonstrate conditions of evolution. INTRODUCTION Natural selection acts on individual organisms affecting their survival and reproduction. But it is a population, not its individuals that actually evolves. In this lab you will investigate how natural selection and other mechanisms cause populations to evolve. The Origin of Species convinced most biologists that species are the products of evolution, but Darwin was not nearly as successful in gaining acceptance for natural selection as the mechanism for evolution. A major obstacle was the lack of any theory of genetics that could explain how chance variations arise, while also accounting for the hereditary precision that perpetuates parents' traits in their offspring. Natural selection was based on what seemed to be a paradox : Like begets like - but not exactly. Darwin could observe the paradox but he could not explain it. Gregor Mendel lived about the same time as Darwin but Mendel's discoveries were unappreciated at the time, even though he had elucidated the very principles of inheritance that could have resolved Darwin"s paradox. An important turing point in evolutionary theory was the birth of

74. Arlequin's Home On The Web Arlequin is the first Exploratory population genetics Software Environment. http://lgb.unige.ch/arlequin/

Arlequin in numbers: since its official launch early 1997, visitors have passed by, Arlequin software has been downloaded times. Arlequin has currently registered users, from whom we have received feedback messages. Why not join the movement ? Download Arlequin for your computer today! Laurent Excoffier

75. Population Genetics population genetics. State Standard (651) Cellular and Molecular concepts, population genetics. Time One or two 50minute class periods http://www.isu.edu/biolearn/Lesson Plans/evolution/lessonplans/LessonPopulationG

Home Topics Biological Evolution Population Genetics State Standard: (651) Cellular and Molecular concepts, (652) Interdependence of Organisms and Biological Change. Download Lesson Plan in Word Format View Lesson Plan in PDF Format POPULATION GENETICS Time: One or two 50-minute class periods Grade Level: Objectives: To understand the basics of evolution by natural selection. To calculate allele frequencies as they relate to inheritance. To understand the Hardy-Weinberg Law and how evolution takes place when this law is not in place. Idaho Achievement Standards: Materials: Background: Students will review some basic genetic principles of inheritance and will review genetic terms such as allele, homozygous, heterozygous, dominant, recessive, gene pool. Procedures: Warm-up. Students will test their ability to taste PTC molecule by using a test strip with the molecule on it. If students taste the strip especially strongly, this indicates they carry two copies of the dominant gene, if only slightly then one copy, and if not at all, then no copy. Have students calculate genotype and allele frequencies of the class "gene pool." Activity: Students will do three simulations that will demonstrate the principles of inheritance. The first simulation will demonstrate genetic equilibrium (the Hardy Weinberg Law), the second will demonstrate genetic drift, and the third will demonstrate a lethal recessive. All three simulations will be recorded on data sheets and the results will be plotted on a graph to show the results visually.

76. Ancient DNA: Neanderthal Population Genetics Ancient DNA Neanderthal population genetics. MATTHIAS HÖSS. Matthias Höss is at the Swiss Institute for Experimental Cancer Research, Chemin des Boveresses http://www.2think.org/neanderthal.shtml

30 March 2000 Nature Ancient DNA: Neanderthal population genetics e-mail: Matthias.Hoss@isrec.unil.ch Authenticity is all in research on ancient DNA. Experience has taught us that even the most exciting claims of the retrieval of ancient DNA are not worth much if they cannot be independently reproduced. Hence the importance of a paper on page 490 of this issue, in which Ovchinnikov et al describe the extraction, amplification and sequencing of DNA from 29,000-year-old archaeological bone material of a Neanderthal recovered from the Mezmaiskaya Cave in the northern Caucasus. This is the second time that such a claim has been made, the first being in 1997 (ref. ). The paper by Ovchinnikov et al . is probably the more important of the two, for it provides invaluable corroboration for the authenticity of Neanderthal DNA sequences. Moreover, sequences of the DNA from a second Neanderthal offer more detailed insight into the contentious evolutionary relationship between Neanderthals and modern humans. , from 80-million-year-old bones of putative dinosaur origin and from insects of up to 130 million years in age trapped in amber The relationship between Neanderthals and humans remains enigmatic, so the retrieval of Neanderthal DNA has been one of the major goals of researchers in the field of ancient DNA. The age of later Neanderthal populations is well within the range compatible with reliable retrieval of ancient DNA (such retrieval is possible from samples up to 100,000 years old). However, it appeared from several studies (for example, ref.

77. Fish Population Genetics Members of the population genetics group at DIFRES, June 1999. First row, left to right Dorte Bekkevold, Birgitte Jacobsen, Cathrin Schmidt (University of http://www.dfu.min.dk/ffi/FFI-ENG/popgen.htm

Fish Population Genetics Members of the population genetics group at DIFRES, June 1999. First row, left to right: Dorte Bekkevold, Birgitte Jacobsen, Cathrin Schmidt (University of Kiel, Germany) and Dorte Meldrup. Last row: Einar Eg Nielsen, Karen-Lise D. Mensberg, Michael M. Hansen, Cino Pertoldi (University of Aarhus) and Daniel Ruzzante (who has now moved to the Dept. of Biology, Dalhousie University, Halifax, Canada). Research The population genetics group of the Danish Institute for Fisheries Research was established in 1994. At present, it includes three scientists, two technicians and a variable number of guest scientists, M.Sc. and Ph.D. students. The group's research interests focus on questions in the areas of population genetics, evolutionary biology and conservation biology. The group works on a number of different topics. Evolutionary dynamics, genetic population structure and phylogeography of freshwater and marine fish species. Conservation biology, in particular genetic interactions between wild and domesticated fish and detection of population declines and bottlenecks.

78. Carolina: AP* Science: Population Genetics And Evolution: The Hardy-Weinberg Rul Carolina markets science supplies and lab science materials for educators and science teachers from elementary school through university in biology, http://www.carolina.com/apscience/population_genetics.asp

Sign up for our email newsletters and receive classroom activities and news about science supplies. Population Genetics and Evolution: The Hardy-Weinberg Rule Background This tasty activity for high school biology students demonstrates the effects of selective predation on a small population. Predators (students) selectively prey upon (eat) fish (Goldfish crackers) in a small population. Prey are replaced with fish randomly selected from an ocean (a mixing bowl full of Goldfish crackers) to create the next generation. Students calculate genotype frequencies for each generation using the Hardy-Weinberg rule. They then examine their data to see if the genotype frequencies have shifted as a result of selective predation. Students work in lab groups of 3 to 4. As an option, you can have the lab groups pool their results and calculate genotype frequencies for the aggregate data. To review, the Hardy-Weinberg rule for a population at genetic equilibrium assumes the following:

79. Genetics, Population Human population genetics Laboratory, Stanford University. The Human population genetics Laboratory (HPGL) headed by Prof LL CavalliSforza of the http://bioresearch.ac.uk/browse/mesh/D005828.html

low graphics Genetics, Population broader: Genetics other: Cytogenetics Genetic Research Genetics, Medical Genetics, Microbial ... Human heredity The journal Human Heredity covers methodological and applied research on the genetics of human populations, linkage analysis, and the genetic mechanisms of disease. Tables of contents and abstracts are available free of charge, but access to full-text articles (in PDF, requiring Adobe Acrobat Reader) is only available through personal or institutional subscription. Published and provided online by S. Karger AG. Periodicals [Publication Type] Linkage (Genetics) Humans Genetics, Population ... Human genome epidemiology network Human Genome Epidemiology Network (HuGENet) is a collaboration of individuals and organisations committed to "the development and dissemination of population-based human genome epidemiologic information." Current activities of HuGE include: an e-Journal Club; publishing Reviews that identify a gene's allelic variants and describes what is known about the frequency of these variants in different populations; Fact Sheets that summarise information about a particular gene, its variants, and associated diseases; Articles in Weekly Update, which reports on population prevalence of genotypes, gene-disease associations, gene-environment and gene-gene interactions and evaluation of genetic tests; Guidelines For Evaluating Human Genome Epidemiology Studies; Case Studies; and a Published Literature Database. Made available on the Web by the US Centers for Disease Control and Prevention (CDC).

80. Population Genetics This course is an introduction to the field of population genetics The genetic and statistical principles underlying population genetics are for the http://www.math.chalmers.se/Stat/Grundutb/Chalmers/TMS106/

Last modified: 2005-03-18 Course TMS106: Population genetics A 5.0 credit units elective course in the Master Programme in Bioinformatics This course is an introduction to the field of population genetics concerned with the genetic structure of populations and how it changes through time under various evolutionary forces. The genetic and statistical principles underlying population genetics are for the most part simple and straightforward which makes the course suitable for two different kinds of students: biology students with affinity for mathematics students with a solid mathematical background, who are interested in genetics Time table The course starts on January 19, 2005 and follows the time table: Wednesdays: 13.15-15.00, room MD1 (no lecture on Feb. 9, CHARM-dag) Fridays: 10.00-11.45, room MD1 Exam dates March 16, 2005, 08.30-12.30, Väg och vatten Reexamination opportunity: April 2, 2005, 08.30-12.30, Väg och vatten TEXTBOOK and the course content : click here Lecture notes : click here Home assignments and Bonus points : click here Prerequisites: familiarity with probability and statistics Grading The entire grade for the course comes from a single exam emphasizing problem solving.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 4     61-80 of 137    Back | 1  | 2  | 3  | 4  | 5  | 6  | 7  | Next 20