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Final Report/Thesis 2018
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====Database==== The second task that was completed was comparing the DNA sample to a database of other people DNA samples. Using the database, we were able to efficiently identify how closely related, the DNA samples were, to other people. Refer back to Figure 26 to see how the database displays the results. The original sample will be compared with the 10%-90% cases of SNP are removal. The objective is to find false positives and false negatives. A false positive in this case would mean that the kit appeared in the removal section and a false negative means the kits disappeared in the original sample. An example below will be shown for a clear understanding. Original: A B C D E 10% of SNP removed: C D G H I false positive: G H I and false negative: A B E As there is thousands and thousands of kits to compare, a sample size of 30 was taken to compare. Figure 33 shows the false positives and false negatives for different percentages of SNPs removed. [[File:soFigure33.jpg|thumb|500px|center|Figure 33. False positives and false negatives]] The x-axis represents how much SNP is removed in the sample and the y-axis is how many false positives or false negatives are found. Unfortunately, in this case the false positives and false negatives equalled each other. The results are all fairly high, at 10% there were only 6 matches with the original case. This indicates that even altering the DNA just by a small amount can have significant change on the DNA. It can be seen as it starts to approach 50% of SNP removal there are more false positives and false negatives, with fewer matches to the original case. At 50% and greater of SNP removed there is 30 false positives and false negatives, this means that no other DNA sample matched the original case.
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