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Evolution Quiz 5

Terms in this set (10)

Why is Hardy-Weinberg a null hypothesis for evolutionary studies?
Hardy-Weinberg provides expected frequencies for alleles in the absence of evolutionary mechanisms
When would we consider an allele to be selectively neutral?
when it has no effect on the fitness of it's bearer
What do population geneticists mean when they refer to assuming a population is infinitely large?
They are assuming there is no change in allele frequencies due to genetic drift
Which of the following are assumptions of the Hardy-Weinberg theorem? (select all that apply)
Populations are infinitely large and will not experience large changes in allele frequencies due to chance, All possible genotypes at a locus will be equally likely to survive and reproduce, and Mutation leading to new alleles will not occur
What is p2?
frequency of one of the phenotypes and the probability that an offspring will receive a p allele from one parent multiplied by the probability that they will receive the same allele from another parent.
In a population of infinite size, which statement accurately describes the eventual fate of a new beneficial allele?
If it is dominant it will rise to high frequency but will not reach fixation; if it is recessive it will reach fixation
A mutation introduces a new allele into a population. If this allele is under positive selection, in which case would it be unable reach 100% frequency in the population?
When the allele is dominant
What the figure above showing with respect to the origin and fate of new mutations?
some new beneficial mutations are fixed by selection, but other alleles may arise but later be lost
You are studying populations of bighorn sheep and coyotes across the landscape. Based on their biology, which species would you expect to show the greatest genetic divergence among populations?
Bighorn sheep should show higher Fst values than coyotes
You are interested in the conservation of American burying beetles and you uncover the following Fst measurements (shown between populations 1-4 below). Based on these results, which population should you focus most of your efforts for increasing connectivity?
Population 4
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