FSCI 1010U Lecture Notes - Lecture 7: Single-Nucleotide Polymorphism, Freckle, Zygosity
Document Summary
If you find blood (there"s no dna analysis) you were looking mostly at blood groups, and other broad differentiates (1 in 200, 1 in 1000). In the late (sometime) dna analysus came up and was able to determine things that narrowed the search more. You want the cheapest test possible, because your checking large areas. Semen spermatozoa & acid phosphatase looking for sperm is done visually, with special lights, chemical tests and very rarely microscopy. Saliva the phadebas test- if saliva is present it will turn dark blue because of the amylase that is present. Unique and inherited, found in all biological specimens containing nucleated cells, cell to cell: dna is different, while most of our dna is similar (99% is the same) there is 1% that is unique to ourself. Dna is very stable- it does not change over 100s of years which is what allows anthropologists to look at.
