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How can Karyotype Analysis Explain Genetic Disorders
How can Karyotype Analysis Explain Genetic Disorders

... Amador Valley High School Campus. The researchers have observed various forms of the insect and have concluded that many of these forms are the result of genetic disorders. You will prepare Karyotypes of the insects found on AVHS’s campus and analyze them for chromosomal abnormalities. Furthermore y ...
F: Acronyms and Glossary
F: Acronyms and Glossary

... then tested for chromosomal defects. In addition, scientists can now analyze the DNA of these cells directly, identifying specific genetic errors. Allele: Alternative form of a genetic locus (e.g., at a locus for eye color there might be alleles resulting in blue or brown eyes); alleles are inherite ...
DNA Structure and Replication
DNA Structure and Replication

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... detect microsatellites is to design PCR primers that are unique to one locus in the genome and that base pair on either side of the repeated portion. Therefore, a single pair of PCR primers will work for every individual in the species and produce different sized products for each of the different l ...
CH 13 Gene Technoogy PPT
CH 13 Gene Technoogy PPT

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... • Chromosomes are digitally arranged so that they are matched with their homologue or “partner” chromosome. • Homologue chromosomes are the same size, shape, and carry the same genes, and one is inherited from each parent. • They are numbered according to size. ...
Epigenetics of Cancer
Epigenetics of Cancer

... embryonic development by catalyzing de novo methylation. • DNMT1: prefers hemi-methylated DNA but can methylate DNA de novo. Is the most abundant DNMT and required for maintenance of methylation patterns. It is required to methylate hemi-methylated sites during replication (in conjunction with UHRF1 ...
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Build Your DNA and Eat It Too
Build Your DNA and Eat It Too

... nucleotide bases. There should be four different colors each representing either, adenine = pink, cytosine = yellow, guanine = green or thymine = orange. ...
Solid Tumour Section Nervous system: Peripheral nerve sheath tumors
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Additional file 5

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Genomic analysis of gene expression Basics of

... • Two labeled cDNAs hybridized to same slide ...
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Supplementary Methods, Figures and Tables This file contains

... ranging from 125 to 2000 spores. DNA was extracted from spores using the Cenis method (Cenis 1992). There was a highly significant relationship between spore number used for DNA extraction and the Ct value (Figure S2). We subsequently used amplification of the RAD15 gene as a measure of AMF quantity ...
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... tinction in sq. ft) was taken to be proportional to the amount of DNA per nucleus.1 Variations in staining from slide to slide were never more than 10 per cent of the mean value for the standard kidney nuclei; such variations were compensated for by a factor of such size as to set equal the mean val ...
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Intro, show Jurassic Park, relate to all other units, Discuss history

... DNA in which short sequences are tandemly repeated in arrays. Tandemly repetitive sequences, commonly called satellite DNA, can be several thousand base pairs. They tend to cluster around the centrosomes and telomeres In general, satellite DNAs show exceptional variability among individuals particul ...
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Cell Cycle DNA Structure and Replication Student PPT Nts

... • ______________________: when a chunk of DNA (usually large) is removed from 1 chromosome and attached to another ...
DNA: The Hereditary Molecule
DNA: The Hereditary Molecule

... couple of interesting news clippings to read and discuss with them when you begin the study of genetics. Then you can challenge them to get started searching for "DNA in the News". In order to sustain interest in this information-gathering project it will be important not to ignore the articles that ...
E1. Sticky ends, which are complementary in their DNA sequence
E1. Sticky ends, which are complementary in their DNA sequence

... E4. In conventional gene cloning, many copies are made because the vector replicates to a high copy number within the cell, and the cells divide to produce many more cells. In PCR, the replication of the DNA to produce many copies is facilitated by primers, nucleotides, and Taq polymerase. E5. First ...
14–3 Human Molecular Genetics
14–3 Human Molecular Genetics

... In 1990, scientists began the Human Genome Project. One goal was to identify and map the locations of all the genes in human DNA. Second goal was to determine the sequence of the 3 billion base pairs that ...
Lecture 7 DNA REPLICATION
Lecture 7 DNA REPLICATION

... inducing bend and destabilizes the 13-mer repeats and causes local melting, allowing DnaB binding (with DnaC help) ...
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Slide 1

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EB nucleic acids AP

... stored information is passed from parent to offspring  need to copy accurately ...
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Comparative genomic hybridization



Comparative genomic hybridization is a molecular cytogenetic method for analysing copy number variations (CNVs) relative to ploidy level in the DNA of a test sample compared to a reference sample, without the need for culturing cells. The aim of this technique is to quickly and efficiently compare two genomic DNA samples arising from two sources, which are most often closely related, because it is suspected that they contain differences in terms of either gains or losses of either whole chromosomes or subchromosomal regions (a portion of a whole chromosome). This technique was originally developed for the evaluation of the differences between the chromosomal complements of solid tumor and normal tissue, and has an improved resoIution of 5-10 megabases compared to the more traditional cytogenetic analysis techniques of giemsa banding and fluorescence in situ hybridization (FISH) which are limited by the resolution of the microscope utilized.This is achieved through the use of competitive fluorescence in situ hybridization. In short, this involves the isolation of DNA from the two sources to be compared, most commonly a test and reference source, independent labelling of each DNA sample with a different fluorophores (fluorescent molecules) of different colours (usually red and green), denaturation of the DNA so that it is single stranded, and the hybridization of the two resultant samples in a 1:1 ratio to a normal metaphase spread of chromosomes, to which the labelled DNA samples will bind at their locus of origin. Using a fluorescence microscope and computer software, the differentially coloured fluorescent signals are then compared along the length of each chromosome for identification of chromosomal differences between the two sources. A higher intensity of the test sample colour in a specific region of a chromosome indicates the gain of material of that region in the corresponding source sample, while a higher intensity of the reference sample colour indicates the loss of material in the test sample in that specific region. A neutral colour (yellow when the fluorophore labels are red and green) indicates no difference between the two samples in that location.CGH is only able to detect unbalanced chromosomal abnormalities. This is because balanced chromosomal abnormalities such as reciprocal translocations, inversions or ring chromosomes do not affect copy number, which is what is detected by CGH technologies. CGH does, however, allow for the exploration of all 46 human chromosomes in single test and the discovery of deletions and duplications, even on the microscopic scale which may lead to the identification of candidate genes to be further explored by other cytological techniques.Through the use of DNA microarrays in conjunction with CGH techniques, the more specific form of array CGH (aCGH) has been developed, allowing for a locus-by-locus measure of CNV with increased resolution as low as 100 kilobases. This improved technique allows for the aetiology of known and unknown conditions to be discovered.
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