[Renfield]

Ping

[txrefugee]

God has had a good laugh to start the day.

[allmendream]

An amazing discovery. I wonder if there are any Neanderthal y chromosomes out among human populations. I know a guy they should test! ;)

[Sacajaweau]

I figured 304,223 years.

[mountainlion]

They used a nonstandard model for dating. Use of standard dating comes out just a little older than current dating. A good expiation of DNA comes form Reasons.org

http://www.reasons.org/podcasts/science-news-flash/y-chromosome-discovery-sparks-evolutionary-debate

[Verginius Rufus]

Maybe this is a dumb question, but how widespread is it for the sex of an individual to be determined by having either XY or XX chromosomes? Is it true of all hominids, or of all primates, or of all mammals? Or is it more widespread than that?

Obviously there is some way that the developing organism is programmed to develop as male or female, but perhaps in some species it is a different chromosome than it is among humans (Homo sapiens or earlier human species).

[Zuben Elgenubi]

I think its quite swell that Renfield is posting chromosomal information.

[mrsmith]

It’s very poor manners to ask a ‘female’ chromosone it’s age.

And publically talking about their age is asking for serious trouble.