Development of molecular genetics

Human genetics has rapidly evolved from vague impression that descendants resemble their parents, to science which is now of utmost importance to the development of new principles and practice in medicine. It was only in the beginning of this century when it was suggested that chromosomes might carry genetic information. During the two last decades researchers have developed amazing methods to study and manipulate genes. This has created new possibilities to diagnose and cure diseases, but also raised ethical and legal questions. These developments are outlined in the present paper.