If allele proportions in a migrant population are different than the proportion in your population of interest, what would you expect to happen to allele proportions in your population of interest? How might population size of the population of interest influence this

b) If there is selection for a particular allele in a population and migration is introduced into the system, what might happen? Give an example as your answer.

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Nelly StrackeLv2

3 May 2018

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10. A neutral allele has a frequency of 0.1 in a population of Flightless Cormorants.

a. If genetic drift is the only force operating, what is the probability under random mating that the allele will ultimately be lost if N=10?

b. Using the same assumptions as above, what is the probability that the allele will be lost if N = 1,000?

c. Which population (N=50 or N=5,000) would you expect to see the least heterozygosity after 10 generations?

d. Assume that you have documented an allele frequency of 0.1 in 5 different populations. How many populations do you expect to fix for the allele of interest?

brownalligator960

Indicate the effect of this condition of the Hardy-Weinbergprinciple on genotype and allele frequencies: assortativemating
a.alters genotype and allele frequencies
b.alters genotype only
c.alters allele frequency only
d.does not alter genotype or allele frequency

Polydactylism (possessing more than five fingers per hand) withinthe Amish population in Pennsylvania is considered an example offounder effect. This is because the frequency of polydactylismamong the Amish in Pennsylvania is identical to its frequency amongthe Amish population in Germany.
a.true.
b.false

A population of bacteria is in Hardy-Weinberg equilibrium. However,through repeated exposure to an antibiotic, the frequency of therecessive allele is rapidly increasing. What is the most likelyexplanation for this response? The recessive allele is responsiblefor susceptibility of the bacteria to the antibiotic.
a.The dominant allele is responsible for susceptibility of thebacteria to the antibiotic.
b.The recessive allele is responsible for resistance of thebacteria to the antibiotic.
c.The population is experiencing gene flow.
d.The population is experiencing disruptive selection.

Biotic environments that influence natural selection includes allbut which of the following?
a.competition
b.predation
c.parasitism
d.weather
e.disease

Why does the malaria disease persist in the human population?
a.Too few humans have died of malaria to end the disease.
b.Multiple phenotypes survive in a balanced polymorphism.
c.Malaria is a recessive disease and few humans are eversick.
d.Humans are protected from the malaria parasite.
e.The disease is under stabilizing selection.

In random mating,;

A.individuals choose the most attractive mate.
B.there is no influence on mate choice.
C.breeding occurs between two different species.
D.breeding occurs between two different subspecies.
E.fertile offspring are not produced.

A fraction of the original green frog population survives toreproduce and generate the new population. If the survivors of theoriginal population survived by chance, then this event is anexample of
A.natural selection.
B.genetic drift.
C.founder effect.
D.industrial melanism.

Which of the following is most likely an example of a foundereffect event?
A.A random small group of a bird population migrates to an islandand then returns to breed.

B.A random large group of a bird population migrates to an islandand then returns to breed.

C.A selected small group of a bird population migrates to an islandand then returns to breed.

D.A random small group of a bird population migrates to an islandand does not return to breed.

E.A random large group of a bird population migrates to an islandand does not return to breed.

Microevolution is not influenced by which of the following?

A.mutation
B.random mating
C.gene flow
D.natural selection
E.genetic drift

A population of finches lives on an island some distance from the mainland, where another population of finches of the same species resides. In both populations, the size of the birds' beaks is influenced by two alleles at the beak locus, B and b. On the island, the frequency of the B allele is 0.9, and the frequency of the b allele is 0.1. On the mainland, both alleles are equally frequent (0.5).

a. If the genotypes at the beak locus have the following fitnesses on the island: w_BB = 1, w_Bb = 0.95, w_bb = 0.9, what is the change in the frequency of the B allele on the island in one generation due to natural selection?

b. What will be the change in the frequency of the B allele on the island in one generation as a combined result of migration and natural selection?

c. If the migration rate from the mainland to the island is 0.05 (meaning that 5% of individuals in the island population migrate in from the mainland every generation), what is the change in the frequency of the B allele in one generation due to migration? Assume there is no migration from the island back to the mainland.