Why is diarrhea hereditary?

Because it runs in your genes!

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Run Jokes More Run Jokes

What Pokemon likes to run?

Lucardio!

Which is better exercise, chasing a car or running away from one?

Chasing a car. After running from a car you'll just be tired, but after chasing one you'll be exhausted.

Gene Jokes More Gene Jokes

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

Why did the twins have twice as many shirts as pants?

Because they shared genes!