What are DNA tests?
Deoxyribonucleic acid commonly referred as DNA is the essential constituent of all human cells. There are 46 chromosomes present in each human nucleus cell apart from the sperms of man and eggs of women who both contain 26 chromosomes each. 46 chromosomes are necessary to create a new human being. So at the time of creation a new human body receives half chromosome from his father and half from his biological mother. dna tests are used to identify the paternity or ancestor of humans. This is a real important tool which is used to track down criminals and thus is a very good technology all around the globe.