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DNA Identification - PowerPoint PPT Presentation


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DNA Identification. Where does DNA come from? 1/2 from mom 1/2 from dad What is it? “Blue print” of life How is DNA different among us? Common vs Different What does “DNA” mean? Deoxyribonucleic Acid. Cell. Where can DNA be found?. Cell Types. Blood. Hair Roots. Saliva. SAME.

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dna identification
DNA Identification
  • Where does DNA come from?
    • 1/2 from mom
    • 1/2 from dad
  • What is it?
    • “Blue print” of life
  • How is DNA different among us?
    • Common vs Different
  • What does “DNA” mean?
    • Deoxyribonucleic Acid
slide2

Cell

Where can DNA be found?

Cell Types

Blood

Hair Roots

Saliva

SAME

Sweat

Semen

Various Tissue

slide3

Types of objects where DNA may be found

  • Blood Stains
  • Semen Stains
  • Chewing Gum
  • Stamps & Envelopes
  • Penile Swabs
  • Sweaty Clothing
  • Bone
  • Hair
  • Fingernail Scrapings
  • Saliva
slide4

Nucleus

Where is DNA in the body?

Cell

slide5

Where types of DNA are found in a cell?

Cell

Mitochondrial DNA

Nuclear DNA

slide6

Nucleus

Paternal

Chromosome

Maternal

Chromosome

Where is DNA in the body?

slide7

Chromosome

DNA

Where is DNA in the body?

slide8

Double Helix

A

T

C

G

DNA- What it looks like

Units

A =Adenine

T =Thymine

G =Guanine

C =Cytosine

slide9

4

5

TCTA

AGAT

TCTA

AGAT

TCTA

TCTA

AGAT

TCTA

AGAT

7

6

AGAT

TCTA

AGAT

TCTA

AGAT

TCTA

TCTA

AGAT

TCTA

TCTA

AGAT

STR

Short Tandem Repeat

AGAT

DNA Profile =4,6

TCTA

DNA Profile =5,7

slide10

DENATURE

A

A

T

T

G

C

G

C

A

A

T

T

T

A

T

A

A

T

A

T

G

G

C

C

Heat

Step one of a single cycle

slide11

ANNEAL

A

A

G

T

G

A

T

T

C

A

C

A

A

T

T

T

T

T

C

Step two of a single cycle

slide12

T

G

G

A

C

A

T

T

G

A

G

T

A

A

G

T

G

A

A

T

G

A

T

A

T

A

T

T

C

T

A

T

C

C

T

EXTEND

Step three of a single cycle