How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

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Tell Jokes More Tell Jokes

How do you tell the difference between members of the GOP and ISIS?

Skin color.

How do you find the pilot at a party?

He'll tell you.

Pull Jokes More Pull Jokes

Why aren't there any baby Transformers?

Because Auto-Bots pull out!

When does a Smurf pull his pants down?

Once in a blue moon.

Gene Jokes More Gene Jokes

Why is diarrhea hereditary?

Because it runs in your genes!

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

Because they shared genes!

X Chromosome Jokes More X Chromosome Jokes

How do you tell an X chromosome from a Y chromosome?

Pull down its genes.

What's a nerdy way of saying a bad word?

A canine with two X chromosomes.

Y Chromosome Jokes More Y Chromosome Jokes

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

Why did Caitlyn Jenner have a differently spelled version of Caitlin?

Because she can't get rid of the Y chromosome