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Author Topic:   One evolving species vs speciation.
PaulK
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Posts: 17822
Joined: 01-10-2003
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Message 7 of 48 (430908)
10-28-2007 8:20 AM
Reply to: Message 4 by Fosdick
10-27-2007 7:02 PM


Re: Flow or drift?
I don't think you've read very carefully. Taz's scenario postulates an absence of gene flow betrween the two populations. That permits drift to carry them in different directions but it also gives selection more opportunity to encourage divergence.

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 Message 4 by Fosdick, posted 10-27-2007 7:02 PM Fosdick has replied

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 Message 9 by Fosdick, posted 10-28-2007 11:13 AM PaulK has replied

  
PaulK
Member
Posts: 17822
Joined: 01-10-2003
Member Rating: 2.2


Message 14 of 48 (430952)
10-28-2007 2:33 PM
Reply to: Message 9 by Fosdick
10-28-2007 11:13 AM


Re: Flow or drift?
Gene flow needs to be mentioned because it is a force that prevents populations from diverging by drift. That is why it is the ABSENCE of gene flow that is relevant. And if the populations do speciate there will NOT be any gene flow between them in the future.
I'm sorry to say this but it seems that you are just picking up on the terms without any sign of understanding what they mean.

This message is a reply to:
 Message 9 by Fosdick, posted 10-28-2007 11:13 AM Fosdick has replied

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 Message 16 by Fosdick, posted 10-28-2007 4:20 PM PaulK has not replied

  
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