Why is diarrhea hereditary?

Because it runs in your genes!

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Run Jokes More Run Jokes

Why doesn't Mexico have a team in the summer Olympics?

Because all the ones who can run, jump or swim are ready in the US.

What did you do in Iran?

I ran.

Gene Jokes More Gene Jokes

What do DNA and Diarrhea have in common?

They both run in your jeans (genes)

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.