These disorders were so far incurable. Their presence would be detected before a child is born and would be cured in the womb itself. In fact, this research has already begun and tens of thousands of genes have been identified, including those responsible for kidney diseases, breast cancer, strokes, diabetes, deafness and skeletal disorders. Besides, there could be tailor-made drugs for each individual depending on one s specific genetic make up. Scientists even have plans to introduce genes or alter them for certain desirable characters or behaviour.
List is endless.
Every living being is made up of tiny units called cells. Each cell has the capacity to develop into a complete individual i.e. a cell from a carrot can grow into a complete carrot plant. It means that each cell has complete information about the organism. It is a delicate double helix structure which is packed inside thread-like chromosomes present within the nucleus. This DNA molecule comprising certain enzymes is often called a wonder molecule because it is the only molecule which is capable of replicating itself, like a living thing A certain portion of DNA molecule which has codes for a particular enzyme is called a gene and there could be a few hundreds to several thousand genes on one chromosome.