Why is DNA useful?
DNA (deoxyribonucleic acid) is a chemical found within the body’s cells. DNA carries the unique code of identity for every individual. Each of us, at conception, receives half of his genes from his mother (the ovum) and half from his father (the sperm). By analyzing, or “typing,” small fragments of a person’s DNA, it is evident which genes came to him from each parent. These genes may be tracked within a family group, from grandparent to grandchild, uncle to niece, brother to sister and so on. Since genes are shared among families, it is sometimes possible to “reconstruct” the probable genetic typing for a deceased relative by testing his immediate family. For all of these reasons, DNA typing, sometimes called DNA fingerprinting, has become a well-accepted tool in determining biological relationships between individuals.
DNA is useful because the forensics can use the DNA to put a person at the scene of a crime DNA is one of the strongest pieces of evidence they are stronger than finger prints because they can get smudged. • Where is it found DNA can be found in blood, hair, and semen DNA is very unique. • What is it made from DNA is made from sugar and phosphate 4 bases (A,T,C,G).
