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Lecture 17

Lecture 17 – Developing and Interpreting a Profile

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Anthropology 2235A/B
Eldon Molto

Lecture 17 – Developing and Interpreting a Profile  Long tradition in forensic based on discernible uniqueness  Need to quantify all variation  E.g., a forensic odontologist finds 5 ante and postmortem agreements and calls a match (what is the chances of each occurring in the population that the individual comes from?)  They do not have these data  To develop a DNA profile there are a large number of complicated steps to follow 1st  Individualizing a person based on their DNA (STR) profiles o D13S317 11,12 – 24% of the population o D7S820 10,11 – 4% of the population o D8S1179 14,15 - 0.6% of the population or 1 out of 167 people o Because each of the STRs is independent of each other basically because they occur on different chromosomes the product rule can be used whereby the relative frequency of each of the 13 STRs  Meaning and Statement of a DNA Match o Approximately 1 person in every 10 trillion chosen at random from the population would be expected to possess the same DNA genotype as that fou
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