Geometry.Net - Basic_G: Gene Testing (dna)

Understanding Gene Testing
DNA. The story of gene testing begins with DNA. DNA is a vast chemicalinformation database. It resides in the core, or nucleus, of
http://rex.nci.nih.gov/behindthenews/ugt/02ugt/ugt02.htm
The DNA Files - Learn More - Gene Testing
in our gene testing section, you might also want to check out these categories The (dna) Marketplace, Ethics, Eugenics,
http://www.dnafiles.org/resources/res04.html

Extractions: Radio Programs General Resources Prenatal Testing Preimplantation Diagnosis Amniocentesis is a common prenatal test, often used to screen for Down syndrome and other serious problems. Did you know that amnios are a type of genetic testing? Have you considered genetic tests to predict your chance of getting breast cancer or another life-challenging disease? Can employers use genetic tests to screen current or potential workers? Find out more about different genetic tests coming to - or already available from - a clinic near you. If you're interested in the resources here in our Gene Testing section, you might also want to check out these categories: The DNA Marketplace Ethics Eugenics Discrimination , and Last Updated: March 2003 Prenatal Genetic Testing - Do You Really Want to Know Your Baby's Future ? (first distributed in November 1998)
DNA Paternity Testing Affordable Acurracy From Analytical Genetic Testing Center
(dna) paternity testing, affordable, (dna) fingerprinting, blood testing, genetic testing and criminal forensic identity testing using (dna) technology from Analytical genetic testing Center, Inc.. Super QUIKgene Rapid (dna) Isolation Kit paternity testing, parentage testing, forensic (dna) analysis, (dna) identity testing, (dna) testing for immigration, adoption
http://www.geneticid.com/
Understanding Gene Testing - DNA
back index next, Science Behind the News, Understanding gene testing. (dna). The storyof gene testing begins with (dna). (dna) is a vast chemical information database.
http://press2.nci.nih.gov/sciencebehind/genetesting/genetesting03.htm
DNA Paternity Testing And More DNA Paternity Testing Services, And More 1. Free
What is gene testing? How does it work? What are some of the pros and cons of gene testing? For what diseases are gene tests available? A brief overview of gene testing and a guide to further resources. skip navigation. gene testing
http://redirect-west.inktomi.com/click?u=http://genetree.com/&y=028231B8AE12F9C4
Understanding Gene Testing - DNA Molecules
back index next, Science Behind the News, Understanding gene testing.(dna) Molecules. Every human cell (with the exception of mature
http://press2.nci.nih.gov/sciencebehind/genetesting/genetesting05.htm
Gene Testing
Another type of (dna) testing involves comparing the sequence of (dna)bases in a patient's gene to a normal version of the gene. Cost
http://www.ornl.gov/hgmis/medicine/genetest.html

Extractions: Site Stats and Credits Quick Links to questions and answers on this page: What is gene testing? How does it work? Gene tests (also called DNA-based tests), the newest and most sophisticated of the techniques used to test for genetic disorders, involve direct examination of the DNA molecule itself. Other genetic tests include biochemical tests for such gene products as enzymes and other proteins and for microscopic examination of stained or fluorescent chromosomes. Genetic tests are used for several reasons, including:
DNA Microarray (Genome Chip) (by Leming Shi, PhD)
connection between such gene discoveries and cancer? these and other gene questions lie in understanding gene discovery, the science behind gene testingthe ability
http://www.gene-chips.com/

Extractions: (c) 1998-2002 by Leming Shi, Ph.D. Welcome to the DNA Microarray (Genome Chip) Web site! This simple, printer-friendly site has been created and maintained by Leming Shi, Ph.D. You'll find the basics on DNA microarray technology and a list of academic and industrial links related to this exciting new technology. Your comments, corrections, and suggestions are welcome. Please help me make this site more useful to you and many other visitors Last updated on January 7, 2002. Credit Warning: This Web site has NO association with Affymetrix, Inc. or its This site was featured in Science magazine ScienceGenomics.org BioMedNet , etc. Concept Design Applications Articles ... Chemical Arrays New Protein Chips DNA Microarray - A technology that is reshaping molecular biology It is widely believed that thousands of genes and their products (i.e., RNA and proteins) in a given living organism function in a complicated and orchestrated way that creates the mystery of life. However, traditional methods in molecular biology generally work on a "one gene in one experiment" basis, which means that the throughput is very limited and the "whole picture" of gene function is hard to obtain. In the past several years, a new technology, called DNA microarray, has attracted tremendous interests among biologists. This technology promises to monitor the whole genome on a single chip so that researchers can have a better picture of the interactions among thousands of genes simultaneously.
Understanding Gene Testing
Tutorial explains the basics of geneticbased diseases such as cancer and explains how chromosome testing works. 04 Chemical Bases in (dna). 05 (dna) Molecules
http://newscenter.cancer.gov/sciencebehind/genetesting/genetesting00.htm
DNA Gene Testing.com - At-Home DNA Paternity Test
(dna) gene testing.com. Buy a Price $185.00. Advances and opportunitiesin (dna)based testing methods gene probes by Barbara Breindel.
http://www.dnagenetesting.com/

Extractions: Paternity DNA Tests Home Personal Legal Half Sibling ... Native American Paternity DNA Gene Tests: Personal Paternity DNA Gene Test Legal Paternity DNA Gene Test Relationship DNA Gene Tests: Half Siblingship DNA Gene Test Full Siblingship DNA Gene Test Cousins DNA Gene Test Aunt/Uncle DNA Gene Test ... DNA/Genetics resources Other Languages: Norge: DNA Farskapstest Partner links: PaternityTestingDNA.com Short time ago, obtaining a paternity test was an uncertain, expensive and inconvenient process. DNA testing has made the process more convenient and the results absolutely conclusive. The specimen collecting is completely painless and comfortable for all ages of children. There are no age restrictions, and testing can be performed on a child of any age at any time of the day.
DNA Gene Testing.com - At-Home Paternity DNA Test
Paternity (dna) gene Tests Personal Paternity (dna) gene Test. Legal Paternity(dna) gene Test. Relationship (dna) gene Tests Half Siblingship (dna) gene Test.
http://www.dnagenetesting.com/DNA_Links-Genetics.php

Extractions: Genetics Links Home Personal Legal Half Sibling ... Native American Paternity DNA Gene Tests: Personal Paternity DNA Gene Test Legal Paternity DNA Gene Test Relationship DNA Gene Tests: Half Siblingship DNA Gene Test Full Siblingship DNA Gene Test Cousins DNA Gene Test Aunt/Uncle DNA Gene Test ... DNA/Genetics resources Other Languages: Norge: DNA Farskapstest Partner links: PaternityTestingDNA.com Genetics Links: Genetics Virtual Library Comprehensive subject catalog covering genetics in the biosciences. Provided by the U.S. Department of Energy and the National Institutes of Health . BBC - Genes Explore the world of genetics and investigate the issues. Features history, health, a gene safari, and DNA detectives. BioScience Research Tool: Genetics Specialized directory of online tools and resources selected for geneticists. Chromosome Web Watch Resource site for researchers. Includes links to conferences and courses, directories, laboratories, journals, and publishers.
Analytical Genetic Testing Center Paternity & Forensic DNA Lab
Specializing in (dna) paternity testing, (dna) fingerprinting, blood testing, genetic testing and criminal forensic identity testing using (dna) technology. genetic Identification Services. (dna) testing. Identitype. Forensic Services the left, the mother has a moon gene and a star gene. The father has a planet gene and a moon gene.
http://www.geneticid.com/we01001.htm

Extractions: Genetic Identification Services Every child inherits one half of its genes from its mother and one half from its father. In a paternity test, samples from the mother, child, and the alleged father are tested for multiple genetic markers. By examining the genetic markers from the biological mother and the child, it can be determined which genetic markers must come from the biological father. If the alleged father shows two or more of the genetic markers that are inconsistent with those given by the biological father he is excluded. He just doesn't have the right genes to be the biological father.
Gene Testing -- Discovery Health | DNA Sciences
refers to the analysis of the gene itself. In concept, genetic testing involves threesimple steps Take a sample of blood or other tissue and extract the (dna),;
http://health.discovery.com/minisites/dna/zm_gtest.html

Extractions: Gene Testing cg_addbib('burgess','9614824', 'http://www.cma.ca/cmaj/vol-158/issue-10/1309.htm','', 'Burgess MM, Laberge CM, Knoppers BM. Bioethics for clinicians: ethics and genetics in medicine. CMAJ 1998;158:1309-13.'); cg_addbib('caulfield','10569090', 'http://www.cma.ca/cmaj/vol-161/issue-9/1122.htm','', 'Caulfield T. Gene testing in the biotech century: are physicians ready? CMAJ 1999;161:1122-4'); cg_addbib('marteau','9522800', 'http://www.bmj.com/cgi/content/full/316/7132/693','', 'Marteau TM, Croyle RT. Psychological responses to genetic testing. BMJ 1998;316:693-696.'); The stage is set for a revolution in medicine growing out of our understanding of genetics. This revolution will affect not only diseases we think of as genetic, but most other diseases as well. While the ability to repair defective genes still lies years, or even decades, in the future, some genetic testing is here today cg_cite('caulfield') Contents of this page... What is genetic testing?
Prenatal Diagnosis -- Discovery Health | DNA Sciences
Sometimes chromosome, (dna), or biochemical studies are required Single gene mutations,such as cystic fibrosis; RJ Prenatal genetic carrier testing using triple
http://health.discovery.com/minisites/dna/zm_prenatal.html

Extractions: Prenatal Diagnosis cg_addbib('amnio','', 'http://www.modimes.org/HealthLibrary2/FactSheets/Amniocentesis.htm','', 'March of Dimes web page on Amniocentesis:'); cg_addbib('triple','', 'http://www.modimes.org/HealthLibrary2/FactSheets/Maternal_Blood_Screening.htm','', 'March of Dimes web page on Triple Screen:'); cg_addbib('russell','', '','http://www.awl.com/russell', 'Russell PJ. Fundamentals of Genetics. New York: HarperCollins, 1994.'); cg_addbib('stranc','9078211', '','', 'Stranc LC, Evans JA, Hamerton JL. Chorionic villus sampling and amniocentesis for prenatal diagnosis. Lancet. 1997;349:711-714.'); To a physician, caring for a mother and her unborn child is no different than caring for anyone else except that a few more problems and a few more alternatives are potentially available. Below, we discuss the problems and potentials of genetic testing as applied to pregnancy. You can find a more general discussion of genetic testing in a separate article: Genetic Testing Contents of this page...
Genetic Testing
is used when the gene cannot be directly identified but can be located within aspecific region of a chromosome. This testing requires additional (dna) from an
http://www.lbl.gov/Education/ELSI/Frames/genetic-testing-f.html

Extractions: Genetic tests use a variety of laboratory techniques to determine if a person has a genetic condition or disease or is likely to get the disease. Individuals may wish to be tested if: There is a family history of one specific disease. They show symptoms of a genetic disorder, Theyr are concerned about passing on a genetic problem to their children. Genetic tests include techniques to examine genes or markers near the genes. Direct testing for diseases such as cystic fibrosis and sickle cell anemia come from an analysis of an individual's specific genes. A technique called linkage analysis , or indirect testing, is used when the gene cannot be directly identified but can be located within a specific region of a chromosome . This testing requires additional DNA from an affected family member for comparison. Because each person's DNA is unique (except for identical twins), genetic tests also can be used for individual identification ("DNA fingerprinting"). Genetic testing is a complex process, and the results depend both on reliable laboratory procedures and accurate interpretation of results. Tests also vary in sensitivity , that is, their ability to detect mutations or to detect all patients who have or will get the disease. Interpretation of test results is often complex even for trained physicians and other health care specialists. When interpreting the results of any genetic test, one must take into account the probability of
Human Gene Testing - The Cutting Edge
The (dna) Sequence Analysis of Human Chromosome 14 From Nature magazine. UnderstandingGene testing - FAQ from the US Department of Health and Human Services
http://www.beyonddiscovery.org/content/view.asp?I=242
Human Gene Testing - Unraveling The Nature Of ...
A major milestone along the trail to gene testing was the discovery of the structureof deoxyribonucleic acid ((dna) ), the molecule that contains genes.
http://www.beyonddiscovery.org/content/view.asp?I=240
NIH - Glossary
distinctive segments of (dna). gene mapping determining the relative positions ofgenes on a chromosome and the distance between them. gene testing examining a
http://www.accessexcellence.org/AE/AEPC/NIH/gene27.html

Extractions: Acquired mutations gene changes that arise within individual cells and accumulate throughout a person's lifetime; also called somatic mutations. (See Hereditary mutation.) Alleles variant forms of the same gene. Different alleles produce variations in inherited characteristics such as eye color or blood type. Alzheimer's disease a disease that causes memory loss, personality changes, dementia and, ultimately, death. Not all cases are inherited, but genes have been found for familial forms of Alzheimer's disease. Amino acid any of a class of 20 molecules that combine to form proteins in living things. Amyotrophic lateral sclerosis an inherited, fatal degenerative nerve disorder; also known as Lou Gehrig's disease. Autosome any of the non-sex-determining chromosomes. Human cells have 22 pairs of autosomes. Base pairs the two complementary, nitrogen-rich molecules held together by weak chemical bonds. Two strands of DNA are held together in the shape of a double helix by the bonds between their base pairs. (See Chemical base.) a gene that normally helps to restrain cell growth.
How Do Scientists Develop Predictive Gene Tests?
of (dna) it binds to the gene - lights up. The fact that some diseases exhibit multiplemutations within the same gene adds to the complexity of gene testing.
http://www.accessexcellence.org/AE/AEPC/NIH/gene15.html

Extractions: Scientists looking for a disease gene typically have begun by studying DNA samples from members of "disease families," in which numerous relatives, over several generations, have developed the same illness such as colon cancer. Researchers look for genetic markers - easily identifiable segments of DNA - that are consistently inherited by persons with the disease but are not found in relatives who are disease-free. Then, they painstakingly narrow down the target DNA area, pull out candidate genes, and look for specific mutations. Before a specific gene is located, linked genetic markers can be used to test members of the family under study. However, to test wider populations, it is necessary to find the gene itself. Because the DNA highway is so vast, this can be enormously difficult. In the case of Huntington's disease, it took 10 years to advance from linkage markers to the gene. Once a disease gene has been cloned (copied to get enough to study in detail) and identified, scientists can construct DNA probes - lengths of single-stranded DNA that match parts of the known gene. (This is possible because, in double-stranded DNA, adenine in one strand always pairs with thymine in the other, and guanine pairs with cytosine.) The single-stranded probe then seeks and binds to complementary bases in the gene. When the probe has been tagged with a radioactive atom, the area of DNA it binds to - the gene - lights up. The fact that some diseases exhibit multiple mutations within the same gene adds to the complexity of gene testing.
THE HUMAN GENOME | Gene Testing
Scientists have found a way to detect genetic diseases gene testing. The techniqueis as follows they scan a patient's (dna) sample to see if one of its
http://the_human_genome.tripod.com/genetesting.html

Extractions: In some cases, scientists are able to predict if a child is going to develop a disease. They follow the inheritance of markers in his/her family. If two parents have the same genetic mutation, their child is at great risk to develop the disease. Although the parents must be carriers for the same disease, they may not be affected by it. Scientists have found a way to detect genetic diseases: gene testing. The technique is as follows: they scan a patient's DNA sample to see if one of its sequences matches up with a mutated sequence ( Human Genome Project Information, Gene Therapy DNA samples can be obtained from anything that is part of the body; hair, blood, skin, etc. Physicians design small pieces of DNA (called probes) whose sequences are similar to specific mutated sequences. The probes will search their complement in the patient's DNA. If his/her DNA contains a mutated sequence, the probe will bind to it and indicate the mutation. Although gene testing is the newest and the most sophisticated technique used to test for genetic disorders and it improved many lives, it brought up many ethical issues. Gene testing is used for some reasons: to clarify a diagnosis to make sure that the treatments used by the patient are appropriate, or to make sure that two parents do not have the same genetic mutation. It is also used to identify people that are at high risk to develop a disease, so they can avoid things that would increase the risk.

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