A genealogical DNA test examines the nucleotides at specific locations on a person's DNA for genetic genealogy purposes. The test results are meant to have no informative medical value and do not determine specific genetic diseases or disorders (see possible exceptions in Medical information below); they are intended only to give genealogical information. Genealogical DNA tests generally involve comparing the results of living individuals as opposed to obtaining samples from deceased people.
Procedure
The general procedure for taking a genealogical DNA test involves taking a painless cheek-scraping at home and mailing the sample to a genetic genealogy laboratory for testing. Some laboratories use mouth wash or chewing gum instead of cheek swabs. Some laboratories offer to store DNA samples for ease of future testing. All laboratories will destroy the DNA sample upon request by the customer, guaranteeing that a sample is not available for further analysis.
2007-03-15 23:51:12
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answer #1
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answered by Anonymous
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a "gene" is a recipe for a protien, a protien is made up of amino acids, every amino acid realtes to a specific sequence of 3 bases, (eg ACU), so the DNA holds the infotmation by being an instruction manual.... "put this amino acid here, this one there, and whoalla... Protien"
so you've got your 4 base sequences (A,U,C or G), and you arrange them in order on on side of the DNA strand, now every group of 3 base sequences ( every codon) is a code for a certain amino acid, and a molecule (tRNA) that carries that amino acid comes along and realises that it is needed there, so it stops, then the next 3 base sequences along mean another amino acid... so the tRNAmolecule that caries that acid stops there, until you have a whole lot of amino acids and making up a protien, which makes up the cells, which makes up the organism.
2007-03-16 02:37:24
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answer #2
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answered by Johanna B 1
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It's a complicated system, somewhat like the bits (info) stored in man-made computer op system files!
2007-03-15 23:50:52
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answer #3
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answered by swanjarvi 7
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