DNA Lab

Bio 181 Lap report#12 DNA is a hereditary double helix strands that present in the nucleus of living cells. DNA acts as the blueprint for all of the proteins synthesized by that cell. There are many chromosomal regions that vary widely between individuals called polymorphic DNA (poly="many", morph="form"). These regions may or may not encode proteins. By examining several of these polymorphic regions within a person's DNA, a DNA "fingerprint" is created for that …

…is only 2-4 nucleotides in length. By examining several different VNTRs or STRs from the same individuals, investigators obtain a unique DNA profile for that person that is unlike anyone else (unless they are identical twins). Because VNTR patterns are inherited genetically, a given person's VNTR pattern is more or less unique. The more VNTR probes used to analyze a person's VNTR pattern, the more distinctive and individualized that pattern, or DNA fingerprint, will be.