Asked by jay
A scientist makes the argument that she has found DNA evidence that shows that evolution does not exist. What would her evidence have to show for her to be correct?
Strong genetic similarities in closely related organisms and weak genetic similarities in distantly related organisms.
Weak genetic similarities in closely related organisms and strong genetic similarities in distantly related organisms.
Strong physical similarities among closely related organisms and also among distantly related organisms.
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Answer: Weak genetic similarities in closely related organisms and strong genetic similarities in distantly related organisms.
Why: Evolution predicts a nested pattern of similarity—closely related species share more DNA with each other than with distant species. Finding the reverse (close relatives genetically very different while distant species are genetically very similar) would directly contradict that prediction. (Note: before overturning evolution, scientists would first rule out lab contamination, sampling/method errors, horizontal gene transfer, or other complicating factors.)
Why: Evolution predicts a nested pattern of similarity—closely related species share more DNA with each other than with distant species. Finding the reverse (close relatives genetically very different while distant species are genetically very similar) would directly contradict that prediction. (Note: before overturning evolution, scientists would first rule out lab contamination, sampling/method errors, horizontal gene transfer, or other complicating factors.)
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