Part 1 of Essay
More than 4,000 diseases are thought to be related to mutated genes that are inherited from one or both parents. But whether a gene actually triggers a disease can be dependent on a variety of factors, including lifestyle and the environment. Genetic testing can determine if a person has a predisposition to a particular co ....

Part 2 of Essay
.... its formative stages, being investigated in basic research laboratories. A number of early human clinical trials have been initiated to test important concepts that have emerged in these laboratory studies. The reasoning for lies in our understanding of the genetic basis of human disease. It is probably safe to say that genes we inherit from our parents influence virtually every human disease. A composite of approximately 150,000 individual genes constitutes a human being. Several years ago, an international effo ....