Read Text C in Unit 4 and fill in the blanks with correct words in the description about how the ‘Junk’ DNA is activated and causes disease.Copies of a dead gene on the tip of (1) （chromosome 4 / chromosome 10）were repeated for (2) （more / fewer）than 10 times. The repeated but dead gene was not completely (3) (inactive / active) and it was transcribed. The transcriptions were (4) (correct / faulty), disintegrating at once.They were (5) (missing / forming) a crucial section, called a poly (A) sequence. When the dead gene had such a sequence, the dead gene was activated. But if people have more than 10 copies of such a dead gene, the chromosome’s structure may be changed, shutting off the region and protect people.