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Author Topic:   When does a species undergoing natural selection, change more?
Taq
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Posts: 9972
Joined: 03-06-2009
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Message 7 of 21 (812683)
06-19-2017 12:53 PM
Reply to: Message 1 by aristotle
06-16-2017 5:18 AM


Aristotle writes:
Does a species change more through natural selection if the weaker, less favored individuals reproduce more, or if the stronger, more favored individuals reproduce more?
The less favored individuals would not be reproducing more, by definition.
Think of it like a car race. In the paragraph above you are asking what happens when the leaders of the race are behind other cars in the running order. That makes no sense. If they are not at the front of the running order then they are not the leaders.
Continuing with our car race analogy, different cars will different advantages on different race courses. An F1 car is the most fit on a smooth road course, but it will lose to a rally car on gravel road. An F1 car will also lose to a drag car on a 1,000 foot straight, while the F1 car will cream the drag car on a road course.
So which is most fit? The F1 car, rally car, or drag car? The answer is that it depends on the environment. The same applies to variations within a species.

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Taq
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Posts: 9972
Joined: 03-06-2009
Member Rating: 5.5


(2)
Message 21 of 21 (813136)
06-23-2017 1:05 PM
Reply to: Message 20 by CRR
06-23-2017 7:17 AM


CRR writes:
This is why the modern version of the ToE proposes mutation as the mechanism by which new alleles are introduced into the species.
The observation of mutations producing new alleles in modern populations is also another reason that the ToE includes the process of mutations.

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 Message 20 by CRR, posted 06-23-2017 7:17 AM CRR has not replied

  
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