1.   Each one signifies an altered gene.

2.   The altered gene has also been found in mink, cattle-and a single killer whale.

3.   Doctors removed bone marrow from her pelvis into which will be injected specially altered genes which are responsible for making the cells of the immune system.

4.   Although these people can become infected, typically they stay healthy two to three years longer than those without any copies of the altered gene.

5.   An altered human gene may help protect people from contracting the most common strains of human immunodeficiency virus, or HIV, scientists said.

6.   And we need to label foods containing altered genes.

7.   Eventually, some noninvasive detection methods might be developed, like chemical markers or a chip that could be encoded with the sequence of a specifically altered gene.

8.   Eventually, Helfand said, scientists might be able to create a drug to mimic the action of the altered gene.

9.   However, Motulsky also speculates that the disease-causing mutations might once have conferred some survival advantage that had the effect of perpetuating those altered genes.

10.   Instead of a doping cycle, one injection of a virus and an altered gene could last an athlete months, or years.