How would you expect selection against mutations to impact the slope of a best-f

Question

How would you expect selection against mutations to impact the slope of a best-fit line of genetic differences between two virion populations? The slope would: Increase Decrease Stay the same In the lab, you read about "non-adaptive" evolution. How is this distinguished from "adaptive" evolution? Adaptive evolution requires variation and selection, whereas non-adaptive evolution does not. Adaptive evolution produces random change over time, whereas non-adaptive changes are non-random. Adaptive evolution occurs only in the absence of non-adaptive evolution. After taking samples of HIV RNA sequences from two infected patients, you plot differences differences over 500 generations. You calculate a y-intercept of -5 and a slope of 2. How many generations before your study began do you estimate that the two virus populations first diverged? 25 generations 50 generations 100 generations 250 generations Not enough information to determine

Explanation / Answer

8 : Decreases

The slope against best fit of genetic differences would decrease. This is because with a selection against mutants, there would be selection of only the wild type thus resulting in lesser variations in the population, unlike selection of mutants , which would result in increase in the genetic variations.

9. Adaptive radiation requires variations and selection , whereas non adaptive radiation does not .

Non adaptive results in lineage diversification and ecological diversification occurring via geographic isolation or by allopatric or parapatric isolation.

10. Not enough information given

To estimate the position of -5 on the y intercept, the scale of y intercept should be known .

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