Even today not all the functions of the extra five known genes are understood.

In the genetically engineered strain, an extra gene has been inserted.

They had extra genes, but it simply wasn't the same.

Ryan and Gifford, both with extra genes, had failed to produce a monster.

Did the extra gene express itself in any altered structure or metabolism of the brain?

Scientists may find a way to remove the extra genes, but that could take 5 or 10 years, he said.

For one thing, having those extra genes doesn't do E. coli much good at all.

The researchers suspect that the extra genes lead to the syndrome.

In the other family, people with the disease inherited an extra gene that was a hybrid of the two heart protein genes.

Onyx-015 is not a vector and carries no extra genes.