
	Where results make sense

Topic: Gene mapping

	How are disease genes identified?
		In narrowing the search for a specific gene, researchers often identify gene markers - characteristic segments of DNA or genes for known traits - thet lie close to the target gene and are inherited along with it.
		Genes and markers that are physically close to one another on the chromosome are said to be tightly linked; they are much less likely to be separated by recombination than are gene markers that are located far apart.
		Benefiting from the increasingly detailed maps and sophisticated DNA sequencing techniques and tools, scientists are mapping and isolating new disease genes at the rate of several per month.
	www.accessexcellence.org /AE/AEPC/NIH/gene11.html (0 words)

	A Gene Map of Roses
		For chromosome mapping, DNA markers associated closely with the genes (traits) are identified and are used as tags to show the presence or absence of these genes in the rose being evaluated.
		Gene mapping is a long-term project starting with identifying the genes to be mapped and creating appropriate study progeny.
		Gene mapping is a means to locate such fragrance genes and to identify the DNA markers associated with these genes.
	aggie-horticulture.tamu.edu /rose/mapping.htm (2470 words)

	Gene Mapping
		The ultimate goal of gene mapping is to clone genes, especially disease genes.
		In 1985, the gene was mapped to chromosome 7q31-q32 by linkage analysis.
		The genetic mapping is based on the linkage between "loci" (locations of genes).
	www.web-books.com /MoBio/Free/Ch10A.htm (0 words)

	Linkage and Gene Mapping - Basic concepts, Linkage in fruit flies, Gene mapping, Modern applications
		Linkage and gene mapping studies have progressed to being a critical tool in cloning genes and providing more description of their roles in the organism.
		Mapping a mutation that causes a disease usually requires assembling enough families that transmit the mutation in hopes that some of them will be heterozygous, or informative, at some RFLP, RAPD, or other markers that are near enough to the disease gene to show linkage.
		The first human disease gene mapped this way was Huntington's disease, which had a LOD score of over 6 for a recombination distance from its marker of between 5 and 10 cM.
	www.biologyreference.com /La-Ma/Linkage-and-Gene-Mapping.html (1839 words)

	Cattle Gene Mapping
		Thue, T.D., Buchanan, F.C. Linkage mapping of POMC to bovine chromosome 11.
		Thue, T.D., Buchanan, F.C. Linkage mapping of FBN1 to bovine chromosome 10.
		Thue, T.D., Buchanan, F.C. Linkage mapping of NPY to bovine chromosome 4.
	homepage.usask.ca /~schmutz/herd.html (1611 words)

	Body Mapping :: University of Southampton
		As part of the human genome mapping project, which started in the 1980s, his team’s work has focused on specific sections of chromosomes in the hope that particular genes or small clusters of genes can be isolated and identified as those that cause disease.
		In 1985, the gene for CF was mapped to chromosome 7q31-q32 by linkage analysis.
		If a mother has a faulty gene it will be passed to her children if they inherit the fragment of chromosome containing the faulty form of the gene.
	www.soton.ac.uk /research/southamptonstories/medhealthlife/bodymapping.html (634 words)

	Mapping \| Macmillan Genetics
		In genetic mapping, this distance is measured by the amount of meiotic recombination that occurs between the two loci.
		Genetic maps contain very important information and are used to help find the genes that can cause, or change the risk of developing, genetic diseases.
		For most diseases, the gene is not yet known and could be any one of the 30,000 to 70,000 genes that exist in the human genome.
	www.bookrags.com /research/mapping-gen-03 (490 words)

	Gene mapping \| patent \|search \|drafting \|registration
		Gene mapping is the technique used primarily in the field of genetic Engineering.This is primarily used to locate the specific chromosome which responsible for the cause of genetic diseases.
		All marker patterns P that satisfy a certain pattern evaluation function e(P) are searched from the data, each marker m.sub.i of the data is scored by a marker score and the location of the gene is predicted as a function of the scores s(m.sub.i) of all the markers m.sub.i in the data.
		Patent No: 5,102,785 titled ‘Method of gene mapping’ with the abstract : The method described characterizes each DNA segment to be mapped by cleaving it to produce DNA fragments which are then end labeled with a reporter(s) specific to the end nucleotides of each fragment.
	www.tmpsearchers.com /gene-mapping.html (590 words)

	GeneMap'99
		This new gene map represents such an index as it includes the locations, within this text, of more than 30,000 genes and provides an early glimpse of some of the most important pieces of the genome.
		Even more importantly, the map can be immediately applied by scientists to the identification and isolation of genes that either directly cause human ailments or increase our susceptibility to disease.
		The construction of this new map was only made possible through the cooperative efforts of an international consortium of scientists who provide equal, full and unrestricted access to the data for the advancement of biology and human health.
	www.ncbi.nlm.nih.gov /genemap99 (0 words)

	Gene Mapping - The Jackson Laboratory
		Use The Jackson Laboratory's unparalleled genetic expertise to map the location of a spontaneous genetic mutation or a non-targeted transgenic insertion.
		We are happy to assist you in the selection of the most appropriate strains to cross with yours in order to create offspring for use in our gene mapping service.
		We usually perform 2 SNP analysis runs, the first involving a genome-wide scan to identify which chromosome your gene lies on, and the second with more densely spaced markers and/or more samples, to refine the linkage region on that chromosome.
	jaxmice.jax.org /services/genemapping.html (279 words)

	[No title]
		For the family to be "informative" or useful for gene mapping, either the sire or dam or both must be heterozygous for the SNP in the gene under study.
		Another reason a gene may be chosen as a candidate gene for further study is that the trait was mapped to a marker on a particular chromosome and that a gene also mapped to that chromosomal region just sounds likely.
		KITLG mapping to CFA15 and exclusion as a candidate gene for merle.
	homepage.usask.ca /~schmutz/mapping.html (1947 words)

	Genetics Society - Gene mapping: Fishing for LD in human populations (Site not responding. Last check: 2007-09-26)
		Fishing for genes in specific populations is a common pastime among human geneticists.
		The strong association of markers with disease in isolated populations has allowed LD mapping to be successfully used to identify monogenic disease genes in these populations.
		The genetically isolated populations of Finland and Sardinia may not be a panacea for linkage disequilibrium mapping of common disease genes.
	www.genetics.org.uk /gene_mapping (640 words)

	FOXNews.com - Ga. Researchers Begin New Gene Mapping - Health News \| Current Health News \| Medical News
		The breakthrough was heralded as ushering in a new era of medicine, which would _ and to some extent has _ led to new ways to test for and treat disease.
		The mapping showed the human genome is built from billions of chemical building blocks that appear in pairs.
		Since then, scientists have been focused on mapping tiny variations in the genetic code of 36 additional people, in an attempt to understand why, for example, some nonsmokers develop lung cancer while some lifelong smokers never get sick.
	www.foxnews.com /wires/2006Aug10/0,4670,NewGeneMapping,00.html (0 words)

	Gene mapping projects
		The Miller laboratory is engaged in a range of mouse gene mapping projects, in a collaboration with David Burke of the Human Genetics Department.
		The genes were typically epistatic: the QTL on chromosome 9, for example, had an effect only in mice that inherited one of the two possible alleles at the QTL on chromosome 10.
		Genes whose effects were not notable until 18 months of age.
	www-personal.umich.edu /~millerr/Gene_mapping_projects.htm (1313 words)

	Gene mapping Summary
		A map, or mapping, is a rule, often expressed as an equation, that specifies a particular element of one set for each element of another set.
		A contig is a continuous region of a gene, chromosome, or genome that is derived from a set of overlapping clones or sequenced fragments of DNA.
		The map improves with the scientific progress and is perfect when the genomic DNA sequencing of the species has been co...
	www.bookrags.com /Gene_mapping (305 words)

	ScienceDaily: Gene Mapping Key To Unlocking Human Secrets, Says Geneticist
		By using this method, if a gene coding for human disease resistance is found on chromosome 1, then Womack can look at the comparative map and hypothesize that a similar gene may be found on chromosome 3 in cattle.
		There are an estimated 30,000-40,000 genes in the mammal, all of which have approximately the same amount of genetic information, whether it be cattle or human.
		Finding where those genes are on a genetic map is a big step to finding the gene and determining what changes the gene makes in a sick or healthy person or animal, Womack says.
	www.sciencedaily.com /releases/2003/05/030526103616.htm (876 words)

	SeeDNA Biotech Inc. Gene mapping, fiber FISH, transgene analysis and cell line karyotyping
		Novel gene or DNA fragment mapping on banded chromosomes (human, mouse, and rat)
		FISH mapping on banded chromosomes is effective for chromosome identification and for the precise mapping.
		Since condensation along a chromosome is not consistent throughout the various stages of metaphase, it is not accurate to map genes by measuring the position on non-banded chromosomes (such as when co-hybridization with known probes is used to identify the chromosomes).
	www.seedna.com /mapping.html (0 words)

	--QTL Mapping - The Jackson Laboratory
		When gene interactions are driving a phenotype, one can propose experimentally verifiable hypotheses regarding the role of these genes in pathways.
		As such it permits the discovery of new genes and can be contrasted with gene-driven approaches such knock-out and knock-in mice which allow for the study of known genes.
		We believe that QTL mapping in model organisms will continue to play an important role in elucidating the relationship between genotype and phenotype in complex systems and that it will be a valuable tool for understanding the role of complex genetics in human health.
	www.jax.org /staff/churchill/labsite/research/qtl (427 words)

	BioMed Central \| Full text \| Accurate and unambiguous tag-to-gene mapping in serial analysis of gene expression
		Finally, the probability of experimentally observing tags mapping to intergenic regions in the genome was calculated by counting the total number of tags belonging to the classes copper and iron, and then dividing this figure by the total number of experimental tags (Figure 2B, right panel).
		In the case of the former, the probability of a tag mapping upstream from an internal poly(A) region is used; otherwise, the probability is obtained based on the position within the transcript that the tag is found.
		The mapping process of experimental SAGE-tags against the virtual library was performed by assigning to the experimental tag the annotation of the high confidence virtual tag, when possible; otherwise, the experimental tag was assigned to multiple transcripts and/or intergenic regions with an undefined confidence.
	www.biomedcentral.com /1471-2105/7/487 (9575 words)

	GENETICS AND GENE
		If a disease-causing gene is recessive, a dog with the gene can be bred to a dog without it and will not produce the disease, although it will produce carriers of the gene.
		Therefore, even if two genes are involved, the elimination of one of these genes will mean that none of the offspring of two animals which are clear of this gene will develop renal dysplasia.
		There is strong linkage between this marker and the defective gene such that about 95% of the definitely affected dogs in these breeds have one or two copies of an allele we have called M (standing for mutant).
	www.lhasaapso.org /HealthGenetics/Gene_Mapping.htm (2599 words)

	Contents - Numbers for Cross Referencing : Genetics
		Homeobox gene repertoires: implications for the evolution of diversity
		Introduction to gene mapping: Linkage at a crossroads
		Gene mapping and the transition from STRPs to SNPs
	www.wiley.com /legacy/wileychi/ggpb/id1-gene.html (331 words)

	Department of Human Genetics \| University of Chicago
		We work on both the localization of the genetic variation, via linkage studies and linkage disequilibrium mapping, as well as on the analytic component to positional cloning of genes for complex disorders.
		There are ongoing collaborations with a variety of groups at the University of Chicago for which we contribute the genetic analysis, including both linkage and linkage disequilibrium mapping, and these include projects on type 1 and type 2 diabetes, asthma and related phenotypes, attention deficit hyperactivity disorder, schizophrenia, bipolar disorder, and autism.
		A recent focus of our research group is on developing a better integration of disease gene mapping (largely linkage disequilibrium mapping in the context of fine-scale mapping) and population genetics, especially on approaches that would enable us to utilize the signature of natural selection in fine-mapping of complex disorders.
	genes.uchicago.edu /cox.html (857 words)

	Gene Mapping
		The function of a particular gene can be determined when the gene of interest is mutated and the resulting mutant is analyzed for differences compared to its wild type.
		When the gene that causes the mutation is tagged by a T-DNA or transposon insertion, a rapid identification of the gene of interest is possible, whereas identification of a gene affected by a chemically induced mutation requires a more time-consuming positional cloning approach.
		Finally, positional cloning of genes is essential to identify the genetic basis of phenotypic variation among ecotypes, i.e.
	www.pg.science.ru.nl /en/project_peters2.html (795 words)

	Gene mapping
		The map (T x E) is composed of 246 codominat loci, 235 RFLPs and 11 isozymes that coalesced in 8 linkage groups.
		Owing to its saturation and to the liability of its markers the map is considered the reference map of the genus Prunus (Joobeur et al.
		The map (P x F) is composed of 109 markers (74 RFLPs, 17 SSRs, 16 RAPDs and 2 morphological traits) distributed in 10 linkage groups.
	www.breeding-fruit.it /Info.htm (651 words)

	Publication Index
		Protein tyrosine phosphatase gene PTPN22 polymorphism in psoriasis: lack of evidence for association.
		Mapping quantitative effects of oligogenes by allelic association.
		Gene polymorphism in Netherton and common atopic disease.
	www.sph.umich.edu /csg/abecasis/publications (1529 words)

	A Three-Point Cross
		And, in this case, a C,c,Bz,bz dihybrid would have missed the two recombination events because they restored the parental configuration, so the "true" value between the loci is the sum of the single recombinants plus twice the frequency of double recombinants.
		Compare these results with the (less accurate) mapping results for the same loci done by test crossing dihybrids rather than trihybrids.
		The gene that is not found in the parental linkage occupies the middle locus.
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/T/ThreePointCross.html (354 words)

	B. S. Weir
		Family-based methods which rely on association for the mapping of genes in human populations.
		In: Population Biology of Genes and Molecules, (Eds.) J.F. Crow and N. Takahata.
		The use of linkage disequilibrium for estimating the recombination fraction between a marker and a disease gene.
	statgen.ncsu.edu /bsw/bsw.html (2340 words)

	David Reich Lab (Site not responding. Last check: 2007-09-26)
		To find genes causing common disease, we have been working on association mapping techniques that study large numbers of unrelated people and have greater statistical power to detect subtle effects.
		We have focused on populations of recently mixed ancestry like African Americans and Latinos, developing statistical techniques (1) and genetic resources (2, 3) to make gene mapping studies powerful in these groups.
		We analyze how the patterns of variability in the genome are shaped by the forces of mutation (11), recombination (12, 13), natural selection and population history.
	genepath.med.harvard.edu /~reich (299 words)

Try your search on: Qwika (all wikis)