Okay, guys, and literally this time I mean guys, guys.

For all the men listening right now, what is the one thing that dwells in each and everyone

of the 30 trillion cells in your body that defines you as the male of the species?

Give you a second or two here to think about it.

Okay, maybe you didn't even need that long because it's kind of an easy question, right?

That's the Y chromosome, of course.

So you'd think that back in 2003 when former president Bill Clinton announced, we're here

to celebrate the completion of the first survey of the entire human genome without a doubt

this is the most important, most wondrous map ever produced by humankind.

Well you would have thought that Clinton meant the entire human genome.

Turns out the map wasn't exactly complete.

More than 10% of human DNA was missing from that first map, notably a detailed, complete

decoding of the Y chromosome, which is kind of odd to me because when you think about

it, the Y is a chromosome in the bodies of 50% of the entire human race.

Well, 20 years later, the Y chromosome is finally getting its due.

This is on point, I'm Magna Chakrabardi.

The Y is the tiniest human chromosome.

It's the short, stubby counterpart to the X chromosome.

Adam Philippi admits it's kind of odd that it hasn't been fully sequenced until now.

He wouldn't expect it to because it's the smallest chromosome.

So you know, why would it take the longest to finish the smallest chromosome?

Philippi is a senior investigator at the National Human Genome Research Institute at the National

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