1.   They found that by introducing a normal gene to substitute the defective one, the mice recovered from the illness.

2.   He sends the defective one out to be fixed.

3.   The defective one will usually have a tarry black compound oozing out.

4.   The software searches out the functional switches and wires, bypassing the defective ones, until a complete circuit is created.

5.   Thus far, efforts to use viruses as carriers to introduce healthy genes to replace the defective ones that cause cystic fibrosis have not worked very well.

6.   Yuletide spirit was sorely lacking as I took down the second set of lights and put together yet another set to replace the defective ones.

7.   The commission issued a second subpoena, the defective one, last month.

8.   The treatment entails slotting in a healthy gene to replace a defective one, with the idea of preventing or even reversing an inherited illness.