Forensic DNA Profiling, Part I

Although the DNA from different individuals is more alike than different, there are many regions of human chromosomes that exhibit a great deal of diversity. Such variable sequences are termed “polymorphic” (meaning many forms) and provide the basis for forensic identification. This experiment uses gel electrophoresis and a DNA chip to examine a highly variable locus within the human genome, like the ones used by the FBI for DNA fingerprinting. This locus, D1S80, contains a variable number of tandem repeats, which can be used to build an individual's unique DNA profile. In this first part of the experiment, join DNALC educator Jeffry Petracca as he demonstrates how to extract and purify DNA from cheek cells using saline mouthwash, and amplify the D1S80 locus by PCR.
Presenter: Jeffry Petracca
Audience: High School, Undergraduate

[DNALearningCenter]

Visit us in Cold Spring Harbor, Brooklyn, or Sleepy Hollow!

[robinburk]

It's amazing how you seem to have a script inside your head and remember every word of it. Very well done, I'm a bit jealous of your teaching skills 👌

[priyadarshini]

very good effort to explain VNTR and its role. we need many more videos of DNA fingerprinting

[Susan-jv]

Just found your video very interesting i have aways been interested in foresic profileing

[masnitamasri]

Tqvm, i've been looking 4 this kind of explanation for quite some time. Your explanation is technically very detail. Lov it. 👍👍👍♥️🤩🤩🤩

[AbdulBari-HTVdrive]

Excellent presentation that help me a lot in preparing my exam .Thank you for such an informative video

[ashamerine]

At 14.03, its possible to get unique repeats for a loci, so its not necessary that STR profile of an individual should be an 100% matched to parents?

[shriyamehta]

Have you use any restriction enzymes here? Or just DNAses to fragment DNA?