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DNA Fingerprinting

DNA Fingerprinting. Mykaylee Copher Jacob Gannon. DNA basics. DNA is the basis of all living organisms and makes each one of its own. DNA holds the alleles to control your traits and the way your body is made and grows. DNA’s role in forensics.

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DNA Fingerprinting

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  1. DNA Fingerprinting MykayleeCopher Jacob Gannon

  2. DNA basics • DNA is the basis of all living organisms and makes each one of its own. • DNA holds the alleles to control your traits and the way your body is made and grows.

  3. DNA’s role in forensics. • DNA is unique to each person in the world to give them a strand set that is different from anyone else’s. • There is a 1/5 trillion chance for any 2 people to be chosen that would have the exact same DNA composer.

  4. DNA Identification • DNA is like writing your name on the crime scene if you were there and you left a trace. • A trace can be skin flakes, hair follicles, blood, saliva, and other bodily fluids.

  5. Blood Splatter

  6. Blood Spatter • The term spatter is a splash of substance on a surface. In this case blood. • Blood spatter is the splashing of blood onto a surface after a crime scene.

  7. Types of blood spatter: • 1.) low velocity • 2.) mid velocity • 3.) high velocity • 4.) passive/flow

  8. What a spatter can tell you • A spatter of blood at a crime scene can tell you at what angle the attack was from, how violent the attack was, and what kind of weapon was used

  9. Questions we were to answer. • DNA fingerprinting • 1.What is DNA? • 2.How is a VNTR related to DNA fingerprinting? • 3.How is DNA fingerprinting used in criminal identification and forensics? • 4.How can a DNA fingerprint identify a person? • Blood Spatter • 1.What is meant by the term blood spatter? • 2.Blood spatters have four main patterns. Draw a picture of each. • 3.What does the spatter pattern tell you about how the blood hit the surface? • 4.What can this information tell you about the crime?

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