If I understand you right, this genetic modification is an acquired survival trait.

These are the survival traits that work best in the city.

Such behavior on this world, Carialle noted, would not be a survival trait.

"As usual, you fail to see that intelligence is not a survival trait."

I've always thought that vigilance was a good survival trait.

That was probably a survival trait among his kind.

He didn't know that panic was a survival trait, in extreme circumstances.

Making things is a survival trait, part of our genetic code.

You now have empirical evidence that empathy is not a survival trait.

It was a survival trait which tied in only too well with our religious beliefs.