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Bio212-01-Alu Lab Part1
Bio212-01-Alu Lab Part1

... In this Lab exercise, we will attempt to isolate our own DNA and then use the Polymerase Chain Reaction (PCR) to analyze our own genetic make-up! Recall that PCR is a powerful technique that mimics cellular DNA replication to make millions of copies of short, specific regions of DNA. We will use thi ...
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... 5. Gently remove comb, pulling it straight up and taking care not to rip wells. 6. When solidified, remove the gel tray from the gel-casting tray and place on platform of electrophoresis box, so that comb is at negative (BLACK) cathode end. The - charged DNA fragments will migrate towards the + anod ...
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...  In the long term, the understanding may lead to significant advances in their management / treatment. In Evolution and Anthropology  Provide insights into evolutionary relationships among various living things In Forensics  DNA sequencing technologies will allow more RFLP loci to be studied, for ...
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... • DNA profiling is a technique by which individuals are identified on the basis of their respective DNA profiles • Within the non-coding region of an individual's genome, there exists satellite DNA - long stretches of DNA made up of repeating elements called short tandem repeats (STRs) • These repea ...
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Utilization of FIA-UV/ED for detection of adenine derivates

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Biology 11.1 Gene Technology

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DNA copy number analysis by MAPH: molecular diagnostic

... an acrylamide gel, one of the primers is labeled either with a radioactive isotope or, more commonly, a Applications of MAPH fluorophore to enable detection by fluorescent-based frag- The applications of MAPH can be classified into two groups ment detection systems. Although gels are routinely used, ...
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... Now that it is clear how important DNA is to generating and maintaining life, we will discuss the application of DNA to forensic testing. As discussed, DNA is composed of a string of nucleotides. Within each human cell, this string is approximately three billion bases long. A fortunate consequence o ...
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November 2010 Prof Angela van Daal Forensic DNA

... the use of the DNA of a family member to identify a closely related suspect through a DNA database search when no exact match has been found. Flanking Region Flanking regions are the stretches of DNA outside the region of interest. For STRs for example, these sequences are the non-repeated DNA regio ...
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2.6-7 and 3.1-3 DNA and intro to Genetics

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< 1 ... 79 80 81 82 83 84 85 86 87 ... 222 >

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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