İngilizce Soru Bankası - paragraf test17 Soru 7

7-) From the information given in the passage, it is clear that ....... .

Scientists believe that today the number of people who are carrying defective genes is increasing. Part-of the explanation for this is that more people are being exposed to damaging radiation, chemicals and other environmental hazards from the side-effects of technology. Another reason may lie in generations of poor nutrition. Medical advances, however, have made it possible for those people with inherited diseases and other deficiencies to live longer, marry and to produce children. Each year increasing numbers of genetic defects are being defined, the ways in which they are transmitted are better understood, and methods for identifying carriers of such defects are being improved. The controversial field of generic surgery, in which harmful genes are altered by direct manipulation, is also being studied.