he now has Leonard Nimoy's DNA.
The Big Bang Theory Season 12, Episode 24
It's my idea of what DNA would look like
in a silicon-based life form.
The Big Bang Theory Season 1, Episode 4
to perpetuate my DNA.
The Big Bang Theory Season 10, Episode 5
Oh, sure, '’cause
Sheldon'’s DNA plus my DNA
The Big Bang Theory Season 12, Episode 3
...that's trying to transgenically manipulate
chicken DNA...
The Big Bang Theory Season 8, Episode 4