Forensics (continued)

Question 1

DNA

Answer 1

Deoxyribonucleic acid, twisted ladders. individual evidence, located in the nucleus of the cell, carries an organism’s genetic information.

No two people have the same DNA,

Question 2

How is DNA collected

Answer 2

Skin, blood, saliva, urine, semen, hair(with follicle).

Question 3

DNA fingerprinting

Answer 3

aka DNA profiling, used in criminal and legal cases to determine identity or parentage.

Question 4

DNA structure

Answer 4

polymer that consists of many monomers called nucleotides.

Each nucleotide has 3 parts
- A phosphate group
- A sugar called deoxyribose
- A nitrogen-containing base

Question 5

Types of nucleotides

Answer 5

Only four types of nucleotides in DNA.
-Thymine (T)
-Cytosine (C)
-Adenine (A)
-Guanine (G)
they are connected with hydrogen bonds

Question 6

Types of nucleotides (2)

Answer 6

The same four bases are found in the DNA of all organisms, but the proportions are different

In the DNA of each organism, the amount of adenine equals the amount of thymine and the amount of cytosine equals the amount of guanine.
A=T and C=G

Question 7

CODIS

Answer 7

When DNA is found, it is compared to DNA entered in the national database- this database is known as CODIS

If the DNA is not registered in the CODIS database, a suspect sample is needed for comparison

Suspect DNA is collected
Hair
Blood
Saliva (buccal swab)

Question 8

DNA profiling (2)

Answer 8

A process or technique of analysis that reveals unique patterns of an individual’s DNA.

The most important discovery in Forensics to date!