What is DNA?

Learn about DNA and its application in forensics! We linked the APA citations below

[What is DNA? @ForensicsandDNA]

If you are wondering, buccal swabs are stored in these sterile containers! This DNA evidence must be handled carefully in order to prevent contamination.

[What is DNA? @ForensicsandDNA]

Observe the image below! Take note of how the forensic investigators are dressed. They try to limit contamination. Find areas of the scene where DNA evidence can be extracted.

[What is DNA? @ForensicsandDNA]

1. _________-Get the DNA out of the cell to work with
2. Amplify- Increase the amount of DNA in the sample
3. Separate- Sort the DNA fragments by size
4. Analyze- Examine the different fragments and create a DNA profile
Which is the correct step that is missing?

[What is DNA? @ForensicsandDNA]

To collect DNA samples from a suspect, swab the inner lining of a cheek with a buccal swab, clip fingernails, or take 10-20 hairs off of the head. Use sterile equipment, and contain the evidence in a sterile container as soon as possible to reduce the risk of contamination.

[What is DNA? @ForensicsandDNA]

Here, we listed some cool forensics techniques used to process DNA! Polymerase Chain Reaction, Restriction Fragment Length Polymorphism, Short Tandem Repeat, Mitochondrial DNA Analysis, Y-Chromosome Analysis and Gel Electrophoresis. Below is the Polymerase Chain Reaction process!

[What is DNA? @ForensicsandDNA]

Speaking of crime scene investigation, DNA evidence can help greatly for forensics scientists. The DNA found at the crime scene can help connect the victim to a suspect.

[What is DNA? @ForensicsandDNA]

What is a DNA profile? Since every person has a unique genetic code embedded in their DNA, we can take an individual's DNA and identify its unique characteristics to create a profile unique to one person much like a fingerprint. It assists in crime scene investigation!

[What is DNA? @ForensicsandDNA]

Lets take a closer look at DNA's structure. DNA is formed as a double helix, ladder like, created by nitrogenous bases such as; adenine, thymine, guanine, and cytosine, with a sugar-phosphate backbone holding it all together. Take a look at the diagram below!

[What is DNA? @ForensicsandDNA]

Let's start off with what it is! DNA is short for Deoxyribonucleic Acid! It is a molecule that contains each and every person’s unique genetic code. Makes us who we are! We have different colored hair and different skin tone because of DNA! Below is how it looks like!