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DNA |
Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson | 0.05 sec. |
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DNA n. scientifically, deoxyribonucleic acid, a chromonal double chain (the famous "double helix") in the nucleus of each living cell the combination of which determines each individual's hereditary characteristics. In law, the importance is the discovery that each person's DNA is different and is found in each living cell, so a hair, blood, skin or any part of the body can be used to identify and distinguish an individual from all other people. DNA testing can result in proof of one's involvement or lack of involvement in a crime scene. While recent DNA tests have proved a convicted killer on death row did not commit a crime and resulted in his release, current debate concerns whether DNA evidence is scientifically certain enough to be admitted in trials. The trend is strongly in favor of admission. |
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Working in the mid-1990s with a roundworm, Fire and Mello found that double-stranded RNA with a given sequence shuts down protein production of the gene with a matching sequence. elegans researchers, allows visitors to search for genes with positive or wild-type RNAi assays by any of a number of maternal, embryonic, and/or postembryonic phenotypes, And the Harvard Medical School Drosophila RNAi Screen Center makes available a library of double-stranded RNAs that can be used by researchers to conduct high-throughput cell-based RNAi screens to identify genes involved in various assays. Along a double-stranded molecule called DNA, which can be found inside every cell's nucleus (center). |
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