California, United States of America
The following excerpt is from People v. Soto, 30 Cal.App.4th 340, 35 Cal.Rptr.2d 846 (Cal. App. 1994):
What exactly does such a match mean? With the exception of identical twins who share identical DNA, no two persons have the same genetic code. (See People v. Pizarro (1992) 10 Cal.App.4th 57, 68, 12 Cal.Rptr.2d 436.) But in this process, the entire genetic strand is not analyzed; only four or five points along the double helix are extracted and compared. Therefore, the geneticist must extrapolate the probability of a sheer random match of the four points actually compared. 9
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