Homework Answers
A gene has two alleles. Fixation of alleles means only one allele of a gene will exist in the population ( frequency of that allele will be 100% in the population) while other allele of the gene will get disappear. The major mechanism responsible for the fixation of allele is genetic drift (change in the frequency of alleles in a population over time).
Option B (genetic drift)
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Which factor, on its own, will ALWAYS lead to fixation of an allele? Gene Flow Genetic...
Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going...
Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going to have to try different values than just those presented in the exercise--try to keep both alleles present! Mutation Natural Selection Gene Flow Genetic Drift
High values of Fst indicate little genetic variation in a local population relative to the total...
High values of Fst indicate little genetic variation in a local population relative to the total population. In other words, there is high population differentiation (low gene flow). True or false? Which of the following is FALSE of Fst? It will increase with increased isolation. It is can be used as a distance measure. mutation and gene flow mutation and genetic drift _________ decreases genetic variability BETWEEN local populations while _________ has the opposite effect, while also decreasing genetic variability...
Which condition can lead to two populations becoming different species? all of these A barrier to...
Which condition can lead to two populations becoming different species? all of these A barrier to gene flow exists between the two populations. Individuals in the two populations have significant genetic differences from one another. Individuals may live in geographically isolated areas. Individuals in the two populations mate at different times. Which of these is NOT an example of adaptive evolution? bottleneck all of these gene flow founder effect Mutation Which of these does NOT influence allele frequencies in a...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote or maintain genetic variation within a population? a) crossing over only b) directional selection and sex c) directional selection, mutation, and speciation d) crossing over, mutation, sex, and gene flow e) only sex Of the following evolutionary forces, crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote genetic differentiation (divergence) among populations?...
In the process of allopatric speciation, a geographical barrier prevents _________ from changing the allele frequencies...
In the process of allopatric speciation, a geographical barrier prevents _________ from changing the allele frequencies in a population. genetic drift mutation natural selection gene flow
Which of the following does not change allele frequencies in a population? A. genetic drift B....
Which of the following does not change allele frequencies in a population? A. genetic drift B. mutation C. migration D. nonrandom mating E. natural selection
Describe the four basic causes of evolution: natural selection, mutation, genetic drift, and gene flow. The...
Describe the four basic causes of evolution: natural selection, mutation, genetic drift, and gene flow. The paper should be 400- 500 words (~ 1 double-spaced, APA formatted page). Refer to the attached document for the grading rubric.
1. What happens to the within-group and between-group genetic variation of the population when gene flow...
1. What happens to the within-group and between-group genetic variation of the population when gene flow occurs in the population? 2. What happens to the within-group and between-group genetic variation of the population when genetic drift occurs in the population? 3. When only one type of allele at a locus is found for a gene, what is this called? 4. What happens to a genetic variation within a population when natural selection is acting on a population? 5. What happens...
During the evolutionary synthesis, biologists conclusively identified natural selection, gene flow, genetic drift, and mutation as...
During the evolutionary synthesis, biologists conclusively identified natural selection, gene flow, genetic drift, and mutation as the major causes of evolution within species. Using the scientific definition of evolution, explain how these forces cause populations, species, and higher taxa to evolve.
are these correct Stopping which of these evolutionary forces can lead to speciation? A. genetic drift...
are these correct
Stopping which of these evolutionary forces can lead to speciation? A. genetic drift OB. gene flow OC. natural selection OD. sexual selection O E. mutations QUESTION 2 Speciation is most commonly a result of A. copatry OB. antipatry OC. allopatry OD. sympatry O E. sexual selection
are these correct
Stopping which of these evolutionary forces can lead to speciation? A. genetic drift OB. gene flow OC. natural selection OD. sexual selection O E. mutations QUESTION 2 Speciation is most commonly a result of A. copatry OB. antipatry OC. allopatry OD. sympatry O E. sexual selection
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