In 2001 scientists reported the successful use of gene therapy to treat three dogs that had been born blind. the animals' blindness was the result of a mutated gene. explain the steps that the scientists probably would have used to restore sight to the dogs

The scientist would probably use the following steps to restore the dogs' eyesight.
>Since normal gene is carried by harmless virus, scientists inject the virus into the eyes of the blind dogs. 
> Virus injected contains normal genes which replace the defective ones. This process is called gene therapy.
> After the process, the dogs can now see.