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Old 09-02-2002, 06:28 AM   #1
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Question Human DNA nearer to kangaroo than cow?

Over on the BBC boards, I've just been told that:

Quote:
It is telling that if one compares the DNA of a human, a cow and a kangaroo one finds that the human DNA is more similar to the kangaroo (a marsupial, of course) than the cow (a fellow mammal). Why is this?
I can make an evolutionary prediction that this is guano, but anyone know where this comes from? What's the story, what have the incubi misunderstood this time?

Cheers, Oolon
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Old 09-02-2002, 06:35 AM   #2
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Hate to bother you, but can I have the link to that topic? That's basically about the most ignorant thing I've read since Eternal's "all bulls are male" and would come in funny for my webpage of stupid quotes

First off, they misunderstood that a marsupial is a mammal...

Even if true, wouldn't it just mean our common ancestor with marsupials was closer than our common ancestor with ungulates?
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Old 09-02-2002, 06:50 AM   #3
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Quote:
Originally posted by WinAce:
<strong>
Even if true, wouldn't it just mean our common ancestor with marsupials was closer than our common ancestor with ungulates?</strong>
Thats about the size of it. I'd like to see where this person got their information!

And thanks, I needed a good laugh!

[ September 02, 2002: Message edited by: wadew ]</p>
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Old 09-02-2002, 07:03 AM   #4
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To make them squirm, ask for the peer-reviewed journal article reference they got this from. They are almost certainly lying.
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Old 09-02-2002, 07:30 AM   #5
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Hey Auto, you stole my line! That's what I was going to ask!!

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Old 09-02-2002, 08:08 AM   #6
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Bring up Gish's bullfrog proteins and ask if this is another example of incompetance and dishonesty.

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Old 09-02-2002, 08:28 AM   #7
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Talking

Quote:
Hey Auto, you stole my line! That's what I was going to ask!!
Neener!
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Old 09-02-2002, 09:14 AM   #8
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Quote:
Originally posted by WinAce:
<strong>Even if true, wouldn't it just mean our common ancestor with marsupials was closer than our common ancestor with ungulates?</strong>

What you're suggesting (based on this write-up), is that ungulates split from marsupials *before* marsupials split from primates. That is, the marsupial+mammal line first split into ungulates, with the remainder continuing until marsupials and primates split. It's not clear if, under this scenario, ungulates or primates represent the bulk of mammalian types, while the other is an outgroup.

How is that possible, when both are placental? I doubt the placental mode arose twice, bracketing marsupials (who, for all I know, are the later refinement anyway). Then again, there are placental sharks, so perhaps it's not such an unusual reproductive mode after all.

*Wait - this wasn't a Nature or Science article; it was a BB posting. Which means it's probably bunk -- but still interesting food for thought.

[ September 02, 2002: Message edited by: Grumpy ]</p>
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Old 09-02-2002, 09:31 AM   #9
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Quote:
Originally posted by WinAce:
<strong>Hate to bother you, but can I have the link to that topic? </strong>
Hi WinAce! The thread is: <a href="http://www.bbc.co.uk/cgi-perl/h2/h2.cgi?thread=%3Cmod.1030524765-16716.11%40forum1.thdo.bbc.co.uk%3E&find=%3Cmod.10 30524765-16716.11%40forum1.thdo.bbc.co.uk%3E&board=science. created&sort=Te" target="_blank">
here</a> (I hope, the url is rather odd...)

The BBC boards are fairly awful to use, by there's some premier-league creationist idiots, and several rather good normal folks (eg our own Albion).

Come on in...

Cheers, Oolon

[ September 02, 2002: Message edited by: Oolon Colluphid ]

[ September 02, 2002: Message edited by: pz (trying to fix that $%#%# url) ]

[ September 02, 2002: Message edited by: pz ]</p>
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Old 09-02-2002, 10:09 AM   #10
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Thank you, Oolon! That board has livened up a lot since you started up over there! Haven't come across the kangaroo thingy yet (just getting started reading the boards this morning); at least it's kangaroos this time, I think last time this came up it was sunflowers or tulips or something. That was based on some creationist's misunderstanding of the details of one particular protein.
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