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Author Topic:   MACROevolution vs MICROevolution - what is it?
jjsemsch
Member (Idle past 4004 days)
Posts: 60
Joined: 04-11-2007


Message 39 of 908 (395445)
04-16-2007 2:49 PM
Reply to: Message 38 by RAZD
04-12-2007 9:12 PM


Re: Bump for jjsemsch
What is the mechanism for evolution? It's natural selection and mutation right?
This message is a reply to:
 Message 38 by RAZD, posted 04-12-2007 9:12 PM RAZD has responded

Replies to this message:
 Message 40 by Nuggin, posted 04-16-2007 2:58 PM jjsemsch has responded
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jjsemsch
Member (Idle past 4004 days)
Posts: 60
Joined: 04-11-2007


Message 41 of 908 (395453)
04-16-2007 3:55 PM
Reply to: Message 40 by Nuggin
04-16-2007 2:58 PM


Re: Bump for jjsemsch
Mutation introduces new genes.
Natural selection changes gene frequency over time.

Have scientists ever observed a mutation that introduced new genes? I thought mutations were genetic copying mistakes that usually hinder progress.

Does natural selection actually help macro-evolution? Natural selection is picking one favorable gene and eliminating a less favorable gene right? To evolve from fish to philosopher there has to be a huge increase in genetic information. These 2 mechanisms seem to limit genetic information not increase it. Are there other mechanisms for macro-evolution or am I missing something?


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 Message 40 by Nuggin, posted 04-16-2007 2:58 PM Nuggin has responded

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 Message 42 by Jazzns, posted 04-16-2007 4:48 PM jjsemsch has responded
 Message 46 by Nuggin, posted 04-16-2007 5:37 PM jjsemsch has not yet responded
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jjsemsch
Member (Idle past 4004 days)
Posts: 60
Joined: 04-11-2007


Message 43 of 908 (395465)
04-16-2007 4:59 PM
Reply to: Message 42 by Jazzns
04-16-2007 4:48 PM


Re: Bump for jjsemsch
Mutation can either:
1. Duplicate genes
2. Change existing genes
3. Delete existing genes

Novel traits can arise by doing both 1 & 2 in sequence. Gene A gets duplicated so you have AA. The second one is changed so now you have AB. Rinse and Repeat.

Using any definition of information ever proposed, this is an increase of information.

So if you have 2 copies of the same book, do you have twice as much information?

And back to my original question:

Have scientists ever observed a mutation that introduced new genes?

Is there ANYONE out there who can answer this question?


This message is a reply to:
 Message 42 by Jazzns, posted 04-16-2007 4:48 PM Jazzns has responded

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