
...that's trying to transgenically manipulate
chicken DNA...
The Big Bang Theory Season 8, 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

Clearly, the combination of our DNA
is exceptional.
The Big Bang Theory Season 10, Episode 8

...but it has been pointed out to me
that you carry DNA of great potential.
The Big Bang Theory Season 1, Episode 15