DNA is such a topic that sparks up a lot of interest and questions in people. Most people have some very basic questions regarding DNA and are confused regarding facts. The internet can provide you with all the answers to some of the most common queries on DNA. You can use findmypast promo code online for some exciting offers. Here are some frequently asked questions on DNA and also their answers. Read on to know them.
- What is DNA?
DNA is a chemical that is present inside every cell of the human body. It is contained inside the chromosomes that occur in 22 pairs in the body, excluding an extra pair of sex chromosomes that determine the sex of an individual. DNA has a double helix shape and consists of twisted strings of chemical letters in each of the chromosomes. The chemical letters stay in pairs, and the first four letters give instructions to the cell about how to construct the proteins that help the body to grow. These determine how the person is to function and what traits a person would have. The parts of the DNA that give out the instructions are called the genes.
- Is DNA unique for every person?
Yes, DNA is unique for every person unless the person has an identical twin. Every person’s genetic code acts as a bar code to identify the person. It contains information about the person, which helps to identify the person. It is only in case of identical twins that they share almost similar DNA, and thus they share the same looks, same traits and characteristics.
- Can DNA be used to identify family members?
A person inherits DNA biologically from both parents, and thus, DNA can be used to identify both the paternal and maternal family. Close relatives have similar DNA sequences than unrelated or distant relatives. Thus, DNA can help to identify parents, siblings, children, and other close relatives.
- How is a DNA sample collected?
One can collect the DNA sample from the body of an individual through blood, saliva or hair. DNA can be obtained usually from the root of the hair and not from cut hair. Ideally, any cell in the body contains DNA and can be used for the analysis of a DNA profile.
- What information does DNA contain?
DNA profiles help to identify the individuals and relatives, but a whole-genome contains other information like characteristics, genetic disorder, risk of passing genetic diseases to offspring, etc.
- Why is DNA essential in crimes?
DNA is often a significant clue in detecting crimes. It helps to match blood samples, hair, body parts or other secretions that may help in identifying the criminal. DNA is collected from crime scenes to match with the suspects to identify the culprit. The police may collect DNA samples from suspects for investigation. The samples are then tested in laboratories, and the data contained in them is analyzed to create the DNA profile.