[单项选择]The last decade has seen a tremendous expansion of scientific knowledge in human genetics. Our understanding of human genes and of the genetic basis of disease has grown dramatically. Currently, more than 4, 000 diseases are known to be genetic and are passed on in families. Moreover, it is now known that alterations in our genes play a role in such common conditions as heart disease, diabetes, and many types of cancer.
The identification of disease-related genes has led to an increase in the number of available genetic tests that detect disease or an individual’s risk of disease. New tests are being developed to detect colon cancer, breast cancer, and other conditions. Scientists are concerned not only that gene tests offered are reliable, but also that patients and health care professionals understand the limitations of such testing. The disclosure of test results could inflict psychological harm to a patient if safe and effective interventions are not also available.
Gene
A. it chiefly centers on predictive gene testing
B. the health care for patients is not professional
C. it may arouse the patients’ discomfort mentally
D. it involves the DNA test and biochemistry