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More than 99% of our dna is going to be the same. so the key for them in terms of the sort of genetic fingerprinting or genetic matching as they call it is to focus on the area that is different. and that could make a much shorter time than, for example, sequencing the entire dna. its not going to be perfect. no ones going to say with 100% accuracy because it is still a little bit of an imperfect science. but thats a little bit of how they do it. >> well, officials have said they compared bin la...

A relative of the person that youre testing. so thats sort of how they do it. and that process can be done within a few hours, anderson. >> how close do the family members need to be? >> thats a good question. you know, for example, if youre looking at a child or a parent, for example, thats going to be the closest because theyre going to share at least about 50% of the dna. with siblings that are full siblings, actual siblings, they could share up to 50% as well, but its a little less clear bec...