ΕUROPEAN CENTER FOR GENETICS & DNA IDENTIFICATION

ΓΕΝΙΚΕΣ ΠΛΗΡΟΦΟΡΙΕΣ

WHAT DNA IS

BASIC BIOCHEMICAL AND GENETIC KNOWLEDGE

 

WHAT IS A GENETIC FINGERPRINT?

A Genetic fingerprint is a person’s genetic identity which is composed of DNA sequences that are distinguishable from one individual to another.

WHAT DNA IS?

DNA (deoxyribonucleic acid) is the genetic material of all living organisms and is organized into stretches of genes that contain the instruction for making all the thousand of proteins that are found in a cell.

Out of the thousand of important properties of living organisms, the most important is that of perpetuation. For this reason, the body must have a full description of himself ,which is equivalent to a manual, to explain the construction of duplication.. Within the cell, DNA is organized into long structures called chromosomes, which contain all the necessary information for DNA’s replication.

DNA consists of four building blocks called nucleotides, which are composed of a nitrogenous base (Adenine (A), Thymine (T), Guanine (G) and Cytosine (C)) and one to three phosphate groups.

DNA exists as a double helix with a pair of molecules that are held tightly together (two strands) and twisted in opposite directions. The two strands are held together by hydrogen bonds between the bases of the strands.

The sequence of the DNA base pairs is formed as a code that spell the genetic words, the genes, which tell our cells what to do. This is like a manual written with 4 letters (A, T, G, C) of which only these 4 letters appear in a certain order (sequence) to form words or sentences.

 

WHERE IS DNA FOUND?

DNA is found in most cells in the human body (approx. 100 trillion), blood, tissues, organs: teeth, hair, saliva, mucus, bones etc

 WHAT ARE THE TYPES OF DNA ?

There are 2 kinds of DNA: nuclear DNA and mitochondrial DNA

30/01/2010 17:09