As someone who actually works with DNA — or, at least, DNA data — I find the drift of the colloquial use of “DNA” disturbing. It’s impossible for me to avoid the resonances of biological determinism, but I’m not sure how other people understand it. I’ve collected a lot of usages, and it seems to have been used in the past to suggest that individuals are being driven by their training or by the historical imperatives of their organisations. Which is sort of fair. But either the meaning is drifting, becoming more crude, or it’s being appropriated for racist purposes.
In this article in yesterday’s Washington Examiner
That Senate Minority Leader Chuck Schumer, D-N.Y., will politicize everything is a given — it’s in his DNA.
Now, I’m pretty sure that the reference to his DNA is not meant to be an ethnic slur. But not completely sure. Why is it there? What is DNA supposed to be adding? Is it his political DNA, his personal DNA (in which case it’s just a redundant statement that this is his immutable characteristic), his family DNA, or his ethnic DNA (which would make it an antisemitic slur). Impossible to say.