
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

I have a sister with the same basic DNA mix
who hostesses at Fuddruckers.
The Big Bang Theory Season 1, Episode 1

Well, no one's going to run
a DNA test on it, Leonard.
The Big Bang Theory Season 4, Episode 6

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