Education

Want to About DNA Fingerprinting Here It Is

The Rajiv Gandhi Centre for Biotechnology (RGCB) in Thiruvananthapuram is carrying out DNA fingerprint examination to identify the bodies of fishermen found from the sea after the Ockhi storm. It is a technique, for identification of an individual by examining their DNA.

DNA, or Deoxyribonucleic acid, is the basic building block of life. This component in cells contains all the information about an organism and it also helps transfer the characteristics to the next generation.

The DNA of each individual is composed of Bases [Adenine (A), Thymine (T), Guanine (G), and Cytosine (C)], Sugar and a Phosphate. Two bases link to each other using hydrogen bonds to form base pairs.

“Every human has three billion such base pairs. Though 99.7% of the make up is similar between any two people; there is a 0.3% difference which accounts to almost 10 million different base pairs. By examining this we can identify the relation between two people. There is a 50% match between a child and his/her father or mother. Between siblings it can range anywhere between 25% to 75%. 

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