he now has Leonard Nimoy's DNA.
The Big Bang Theory Season 12, Episode 24
to perpetuate my DNA.
The Big Bang Theory Season 10, Episode 5
Who's to say
that I don't share that flawed DNA?
The Big Bang Theory Season 4, Episode 2
...that's trying to transgenically manipulate
chicken DNA...
The Big Bang Theory Season 8, Episode 4
except that this is from my DNA,
so this is like me-monkeys.
The Big Bang Theory Season 10, Episode 8