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

Pull down its genes.

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Tell Jokes More Tell Jokes

Why didn't you give me anything for my birthday?

GirlFriend: You told me to surprise you.

What did the dumb blonde say when told that "Scheherezade" was composed by Rimsky-Korsakov ?

A: "Why'd his mom choose to call him Rimsky of all names !! "

Pull Jokes More Pull Jokes

Why haven't you pulled over yet?

I said, "Because we're still in Detroit."

Why is a fire truck always red?

Cause you'd be mad too if someone kept pulling your hose.

Gene Jokes More Gene Jokes

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

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

Pull down its genes.

X Chromosome Jokes More X Chromosome Jokes

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

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

Pull down its genes.

Y Chromosome Jokes More Y Chromosome Jokes

How do you tell X chromosomes from Y chromosomes?

You pull down their genes.

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

Pull down its genes.