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Topic: Allele


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 Introduction to Evolutionary Biology
For example, humans can have A, B or O alleles that determine one aspect of their blood type.
Allele frequencies can change due to chance alone.
Genetic variation has two components: allelic diversity and non- random associations of alleles.
http://www.talkorigins.org/faqs/faq-intro-to-biology.html   (15764 words)

  
 B/b, E/e, and Beyond
Therefore, although all Labs should be homozygous for the S allele at the S gene locus, some may still express white hairs on the chest, bottom of the feet and under the arms and groin areas.
Reasons for the controversy stem from the lack of information available to trace the origins of this color in the breed as well as the fact that the AKC standard for the Labrador breed does not acknowledge silver as an acceptable color for a Lab.
" allele that controls brindling in many other breeds of dogs.
http://www.labbies.com/genetics2.htm   (6627 words)

  
 Tonkinese Genetics
The second mechanism is the heat sensitive albino series alleles that create our coat pattern by suppressing the pigment in the warmer areas of the body.
You can sometimes use logic and knowledge of the color of the parents to determine what hidden alleles are carried by their offspring.
But it is possible for eye color to vary from what is the standard for the particular coat pattern.
http://www.tonkinesebreedassociation.org/tonkgenetics.html   (4611 words)

  
 A Molecular Genetic Study of Factors Involved in Alzheimer's Disease
4 allele, and between those with familial and sporadic disease were tested using a case-only analysis.
This explanation is supported by the fact that in two of these studies, including the initial one, AD and control subjects were collected from England suggesting a common genetic origin for those two study cohorts (Lehmann et al., 1997, Tilley et al., 1999).
Linkage disequlibrium between ApoE and –491A/T polymorphism alleles was further assessed using haplotype estimation analysis.
http://www.uku.fi/neuro/53the.htm   (13932 words)

  
 Molecular genetics of Alzheimer's disease
The idea of this method is to follow the segregation of marker allele(s) from parents to offspring in families with affected and non-affected members.
Thus the e4 allele frequencies were similar to ours in both studies.
Linkage analysis is a commonly used method to study pedigrees with inherited diseases.
http://www.uku.fi/neuro/44the.htm   (18824 words)

  
 Allele Frequency
Evolution is only concerned about the change in allele frequency in a population.
Instead, the environmental stressor changes allele frequency in some way, thus changing the population.
Thanks for taking the time to read my views.
http://www.ridgecrest.ca.us/~do_while/sage/v7i9e.htm   (973 words)

  
 Heterogeneous allele expression of pulmonary SP-D gene in rat large intestine and other tissues -- Lin and Floros 11 ...
For quality control, 10% of the samples were randomly chosen and regenotyped, and upon visual inspection the pattern of allele expression was as previously observed.
we analyzed SP-D allele expression in the large intestine from
To study differences in allele-specific expression among individual
http://physiolgenomics.physiology.org/cgi/content/full/11/3/235   (5645 words)

  
 Imprinting
Considerable interest has been generated by the realization that the penetrance and severity of many complex human diseases can be affected by the sex of the parent contributing the allele responsible for the disease.
Darkened body indicates individual that is mutant for the hypothetical imprinted locus.
The parent of origin effects associated with a disease suggest that imprinting may be involved.
http://www.ucalgary.ca/UofC/eduweb/virtualembryo/imprinting.html   (3119 words)

  
 The Hardy-Weinberg Equilibrium
Potentially harmful recessive alleles - invisible in the parents - become exposed to the forces of natural selection in the children.
The change in frequency of the dominant allele (Δp) after one generation is expressed by the equation
This is what Mendel found when he crossed monohybrids [Link].
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/H/Hardy_Weinberg.html   (1731 words)

  
 Allele - Wikipedia, the free encyclopedia
A dominant phenotype will be expressed when only one allele of its associated type is present, whereas a recessive phenotype will only be expressed when both alleles are of its associated type.
In an organism which has two copies of each of its chromosomes (a diploid organism), two alleles make up the individual's genotype.
A wild type allele is an allele which is considered to be "normal" for the organism in question, as opposed to a mutant allele which is usually a relatively new modification.
http://en.wikipedia.org/wiki/Allele   (608 words)

  
 Allele frequency - Wikipedia, the free encyclopedia
When these conditions apply, a population is said to be in Hardy-Weinberg equilibrium.
Four out of five will be occupied by other variants of the gene, of which there may be one or many.
If p_t is the frequency of the A allele in generation t, if q_t=1-p_t is the frequency of the a allele in generation t, and if there are no other causes of gene frequency change (no natural selection, for example), then the change in allele frequency in one generation is
http://en.wikipedia.org/wiki/Allele_frequency   (753 words)

  
 Coat Color Genetics
These hairs may be found either in a distinctive pattern on the points (such as legs, mane and tail), or black hair may be the only hair color (with the exception of white markings) over the entire body.
Observed Effect of Alleles in Homozygous and Heterozygous Condition
Often when the gene pair is heterozygous, one allele may be visibly expressed but the other is not.
http://www.vgl.ucdavis.edu/~lvmillon/coatcolor/coatclr3.html   (3980 words)

  
 Glossary
One of a pair of alleles that suppresses the expression of the other in heterozygous (having one dominant and one recessive allele) conditions.
A genetic condition arising when an allele coding for a specific genetic trait or disease is only found on the X-chromosome.
An allele which has little or no effect on the phenotype of an organism when paired with a more dominant allele; it only has an effect when paired with another recessive allele.
http://history.nih.gov/exhibits/genetics/appb.htm   (1617 words)

  
 Introductory Biology Courseware- Glossary
Codominance- A phenotypic situation in which both alleles are expressed in the heterozygote.
Structural variations between alleles may lead to different phenotypes for a given trait.
Allele- Alternate forms of a gene which may be found at a given location (locus) on members of a homologous set of chromosomes.
http://tidepool.st.usm.edu/crswr/glossaryad.htm   (8381 words)

  
 The Genetics of Human Eye Color
Albinos also lack melanin in their skin and hair.
In a third process called codominance, the affect of each allele is expressed simultaneously.
In a heterozygous gene pair, one allele may be expressed over the other.
http://www.seps.org/cvoracle/faq/eyecolor.html   (1333 words)

  
 allele - Hutchinson encyclopedia article about allele
In a heterozygous organism the appearance of the organism (phenotype) may be determined by one allele and not the other.
If, however, one chromosome contains one allele and the other chromosome a contrasting allele, the organism is said to be heterozygous.
The expression of the other allele is described as being recessive.
http://encyclopedia.farlex.com/allele   (291 words)

  
 Genetics 372, Definition of Course Terms
Recessive allele An allele whose phenotypic effect is not expressed in a heterozygote.
Carrier In human genetics, an individual heterozygous for a mutant allele that generally causes disease only in the homozygous state.
Homozygote An individual possessing a pair of identical alleles at a given locus on a pair of homologous chromosomes.
http://depts.washington.edu/~genetics/courses/genet372/w2000Terms.html   (2330 words)

  
 Birgid Schlindwein's Hypermedia Glossary Of Genetic Terms - Search results
Diploid organisms have 2 alleles at a given locus, i.e.
The same allele is present at a given locus.
An attribute or character of an individual within a species for which heritable differences can be defined.
http://hal.weihenstephan.de/genglos/asp/genreq.asp?nr=4   (555 words)

  
 DNA-Diagnosis - Encyclopedia
A p-value > 99.9 percent or analogous statistical values correspond to the verbal predicate "paternity practically proved".
Combination of characteristics of both alleles from the locus of an individual.
Furthermore, we work with two different analytical systems and accept only exclusions which occur in both systems.
http://en.dna-diagnosis.com/encyclopedia/encyclopedia.html   (1189 words)

  
 Dachshund Puppies by Li'l Dachs - Li'l Dachs Genetics
they have two alleles (100%) for that trait, or may have only one allele (50%) for it.
may be effected to some degree by a recessive allele.
which means that allele's trait can be effected
http://www.lildachs.com/genetics.htm   (5507 words)

  
 Hardy Weinberg Equation
The frequency of carriers (heterozygotes) for the CF allele is
The frequency of the normal allele is equal to 1 - the frequency of the Cf allele
This equation can be generated in two ways.
http://www.people.virginia.edu/~rjh9u/hwequa.html   (581 words)

  
 IMGT Marie-Paule page: IMGT index
The 'allele' concept is part of the 'CLASSIFICATION' concept of IMGT-ONTOLOGY[8]
Their description is according to the IMGT allele nomenclature for sequence polymorphisms which has been set up for IG and TR of human and other vertebrates (IMGT Scientific chart).
Allele IMGT reference sequences are described according to the IMGT unique numbering [7] (IMGT Scientific chart).
http://imgt.cines.fr/textes/IMGTindex/allele.html   (344 words)

  
 allele
[n] one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits; "some alleles are dominant over others".
http://lookwayup.com/lwu.exe/lwu/d?s=f&w=allele   (30 words)

  
 NMDP Allele Code Lists
DRB3*0101/0102/0203/0206) are called "allele specific" codes and can only be used with the locus and allele family that were used when it was initially created.
Finally, do not substitute generic alleles for those which contain an expression character.
There are some codes which can be used with several loci and several allele families, these are called "generic" codes.
http://www.nmdpresearch.org/HLA/allele_code_lists.html   (645 words)

  
 HOPES Glossary, A
All alleles for a particular gene code for the same trait, but they influence the trait in different ways.
For example, different alleles for the hair color gene correspond to different hair colors.
The end result of its release is an increase in blood pressure.
http://www.stanford.edu/group/hopes/sttools/gloss/a.html   (2235 words)

  
 Bengal Cats: Genetics of Cats, Domestic Cat Genetics & Wild Cat Genetics, Chromosomes, Mutations, Alleles, Color, and ...
This is the allele responsible for the seal lynxpoint (and blue-eyed) "snow" Bengals.
This mutation, unlike the Manx mutation, is not crippling and does not cause deformation of the spine.
Believe it or not, geneticists are making some fabulous new discoveries linking certain color combinations in felines to specific medical conditions such as obesity -- AND, they are beginning to find linking relationships between the color genes and certain temperament and personality traits!
http://www.hdw-inc.com/genetics.htm   (4178 words)

  
 allele - definition of allele by the Free Online Dictionary, Thesaurus and Encyclopedia.
allele - one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits; "some alleles are dominant over others"
This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
One member of a pair or series of genes that occupy a specific position on a specific chromosome.
http://www.thefreedictionary.com/allele   (168 words)

  
 Drug Discovery & Development
An allele that is expressed in the phenotype of the organism only when present in the homozygous form.
An allele with a phenotype that is expressed whether the allele is heterozygous or homozygous.
The decreasing size and increasing speed of analytic and other tools are helping researchers work more efficiently and productively.
http://www.dddmag.com/scripts/Glossary.asp?RPTID=KWSRCH&SEARCHMETHOD=WORD&SEARCHWORD=Allele   (187 words)

  
 NDI Terminology - allele
In humans and other diploid organisms there are two alleles, one on each chromosome of a homologous pair.
Any alternative form of a gene that can occupy a particular chromosomal lucus.
http://www.ndif.org/Terms/allele.html   (31 words)

  
 allele. The New Dictionary of Cultural Literacy, Third Edition. 2002
There can be several variations of this sequence, and each of these is called an allele.
In the case of the gene for eye color, for example, one allele codes for blue eyes, whereas the other may code for brown eyes.
http://www.bartleby.com/59/21/allele.html   (159 words)

  
 Allele definition - Medical Dictionary definitions of popular medical terms
Allele definition - Medical Dictionary definitions of popular medical terms
MedicineNet Home > MedTerms medical dictionary A-Z List > Allele
Please consult your healthcare provider before beginning any course of supplementation or treatment.
http://www.medterms.com/script/main/art.asp?articlekey=2193   (166 words)

  
 Allele Registry
Currently, there is no organized method for verifying that newly defined alleles actually have the reported sequence, nor is there a mechanism for providing cells or DNA representative of these alleles to interested investigators worldwide.
Appropriate reference laboratories will be identified to perform confirmatory testing of newly defined alleles if this has not been previously done.
The overall goal of this project is to establish an ongoing mechanism for verifying the sequence of newly reported alleles, for collecting cells expressing these alleles in a central repository, and for making them available to investigators worldwide in a coordinated and effective manner.
http://www.ihwg.org/components/newallr.htm   (862 words)

  
 Population Biology Simulations
Natural selection -- This simulation illustrates how allele frequencies change over time in response to natural selection on diploid genotypes.
Users may select from a variety of allele frequency configurations and several different inbreeding coefficients within populations (all populations are assumed to have the same inbreeding coefficient).
Results from each iteration are displayed, but only six iterations can be displayed simultaenously.
http://darwin.eeb.uconn.edu/simulations/simulations.html   (923 words)

  
 Corporate Punishment Records - Artists
No place like home and ALLELE is inviting everyone that can make the show at PLUSH to be there.
That makes it all the more special when a band comes along and throws off every doubter’s expectation, connecting with fans on a musical, if not spiritual, level.
Hayes, who had grown increasingly disenfranchised with his role in Cold, looked to Allele as a fresh, new creative outlet. 
http://www.corporatepunishment.com/artists/Allele   (506 words)

  
 EMBL Feature List
all gene-related features (exon, CDS etc) for a given gene should share the same /allele qualifier value; the /allele qualifier value must, by definition, be different from the /gene qualifier value; when used with the variation feature key, the allele qualifier value should be that of the variant.
name of the allele for the given gene
http://www3.ebi.ac.uk/Services/WebFeat/qualifiers/allele.html   (56 words)

  
 purevolume™ Allele
Look for their debut album later this year through Corporate Punishment Records.
Los Angeles, CA Allele features founding COLD guitarist Kelly Hayes and former OTEP guitarist Lane Maverick.
You must be logged in as a “LISTENER” to add comments.
http://www.purevolume.com/allele   (59 words)

  
 NMDP Allele Code Resources
Identify or expand a specific NMDP allele code, which may be used when reporting results of intermediate resolution HLA typing or when evaluating associated allele combinations.
Subscribe to the NMDP allele code e-mail list, which is sent automatically (as a zip file, tab text format) to you.
Display a list of NMDP allele codes that is sorted either numerically or alphabetically and can be downloaded in a variety of formats.
http://www.nmdpresearch.org/HLA/allele_code_resources.html   (78 words)

  
 Allele
Actual allele names are obtained by adding the constant K (top of table) to the number shown in the leftmost column.
http://www.gefi-forensicdna.it/tab_freq_profiler/tab_all_naz.htm   (21 words)

  
 Allele Music Dot Com - The Official Site of Allele © 2005
Copyright © 2005 Allele and Corporate Punishment Records.
Allele Music Dot Com - The Official Site of Allele © 2005
http://www.allelemusic.com   (45 words)

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