Friday, October 24, 2014

Color Variation in Venezuelan Guppies by Nida and Jube

12 comments:

  1. How did you interpret your evidence?
    Do you need to include all pieces in evidence to support your claim?
    How can you better explain gene flow to form a strong argument?
    Consider maybe just talking about gene flow and not another mechanism of evolution, like sexual selection. I makes your argument unclear and not as strong.

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  2. I thought that your reasoning for how the evidence showed how gene flow was the cause of the trend. I would explain the reasoning better so that way it supports your claim better.

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  3. I thought that your reasoning for how the evidence showed how gene flow was the cause of the trend. I would explain the reasoning better so that way it supports your claim better.

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  4. I do not understand how gene flow is proved by your evidence

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  5. Why did you decide that gene flow is the main evolutionary pressure? This may not necessarily have as great of an effect on the population. Consider whether both variations of guppies may have been there initially and one was able to survive better under certain specific conditions.

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    1. We chose gene flow because there are drastic changes in the population as the guppies go from the shallow side of the river to the deeper side of the river. These changes are evident because they must have mated with one another to produce all of the variations we now see. We focused mainly on the question at hand which was "What caused these trends in the coloration of the guppies?" Therefore, we chose gene flow because it would have been the initial cause of these trends.

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  6. I appreciate the effort you put into creating this well presented slide show. However, I do have some questions about it. Could you please further clarify your claim about sexual selection?

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  7. Your claim of gene flow is nicely supported by your evidence and reasoning. Was there any other evidence you considered for your claim of sexual selection because it seems as though there is only one piece of evidence for sexual selection.

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    1. Thank you Rameia. Sexual selection also supports our claim of gene flow. Since more female guppies were attracted towards the bright colored male guppies, the drab males died out.

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  8. The evidence that was provided also seems to support the sexual selection part of the claim more than the gene flow component of the claim.

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  9. I believe that your evidence and reasoning for sexual selection is much stronger than the evidence you have for gene flow. The evidence and reasoning for gene flow is somewhat jumbled and leaves a lot of open-ended questions as to how some of the things you described came to be. I think the gene flow argument can be used to describe how does traits came to exist in the different ponds, but not how the observed trends exist in the pools.

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