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Dna fingerprinting
 

Dna fingerprinting

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    Dna fingerprinting Dna fingerprinting Presentation Transcript

    • WHAT IS DNA FINGERPRINTING?0Did you know that your DNA has a “fingerprint”?0It is can be used to identify a person0If you like shows like CSI then you may have heard of identifying people by their DNA0That is done through DNA fingerprinting0All you need is some DNA
    • How do you get a DNA fingerprint?0First you need some DNA0Through a process of cutting the DNA with a restriction enzyme (remember enzymes from Unit 5?) and then putting the DNA through Gel Electrophoresis, the DNA makes a “fingerprint”0Gel Electrophoresis – uses gel and electricity to separate the DNA
    • What are some uses of DNA fingerprinting?0Solving crimes0Determining paternity
    • This is what a DNAfingerprint looks like….
    • Parents share… 0Bands in the DNA fingerprint with their children 0Each band in the child’s DNA will be the same as either their mother and their fatherIn forensics, criminals will have matching DNA fingerprinting to the DNA found at the scene of the crime
    • Who is the criminal??? The DNA from the scene matches DinoOnline Images. Access Excellence. 13 May 2007.http://www.accessexcellence.org/AE/AEPC/WWC/1994/fly_forensics.html
    • Look at this oldEOCquestion!!!
    • The answer issuspect C.They have thesame bands!
    • Results from a single locusprobe DNA fingerprintanalysis for a man andwoman and their fourchildren are shown in theautoradiograph to the right.Which child is least likely tobe the biological offspring ofthis couple?A. Child 1B. Child 2C. Child 3D. Child 4
    • This was a trickyproblem. If child 2 isthe child of this manand woman, child 2must have one bandfrom each of them.However, child 2appears to share twobands with themother and nonefrom the "father."Obviously, themother could nothave contributedboth bands (alleles)to her child.