2024 EVOLVE HESI FUNDAMENTALS VERSION 1,2& 3 ACTUAL EXAM EACH VERSION CONTAINS 400
QUESTIONS AND CORRECT DETAILED ANSWERS
What is migration - (Answer)Migration is the movement of alleles between populations
It is the transfer of alleles from the gene pool of one population to the gene pool of another
population
What were the original allele frequencies and the final ones on the island - (Answer)The island first
started with a frequency of 1 of A1A1 allele. When 200 individuals migrated from continent to the
island, the allele frequencies changed to 0.8 A1A1, 0 for A1A2 and 0.2 for A2A2.
Migration had changed the allele frequencies in the island population
What does migration tend to do - (Answer)Migration tends to homogenize allele frequencies across
populations, it will eventually equalize their allele frequencies
If not opposed by another mechanism of evolution, migration will homogenize allele frequencies
across populations completely
What are three population genetics phenomena - (Answer)Migration, genetic drift and nonrandom
mating
What does Fst represent - (Answer)Fst refers to a group of populations and reflects the variation in
allele frequencies among the populations in the group, taking a value from 0 to 1
Larger values represent more variation in allele frequency among populations
populations homogenized by gene flow will have similar allele frequencies and thus low Fst value
What did they find in the red bladder campions - (Answer)They found that there is less variation in
allele frequencies among populations of intermediate age than among young and old population
What doesnt genetic drift do - (Answer)Genetic drift does not lead to adaptation, but it does lead to
changes in allele frequencies. In the Hardy Weinberg model, genetic drift results from violation of the
assumption of infinite population size
QUESTIONS AND CORRECT DETAILED ANSWERS
What is migration - (Answer)Migration is the movement of alleles between populations
It is the transfer of alleles from the gene pool of one population to the gene pool of another
population
What were the original allele frequencies and the final ones on the island - (Answer)The island first
started with a frequency of 1 of A1A1 allele. When 200 individuals migrated from continent to the
island, the allele frequencies changed to 0.8 A1A1, 0 for A1A2 and 0.2 for A2A2.
Migration had changed the allele frequencies in the island population
What does migration tend to do - (Answer)Migration tends to homogenize allele frequencies across
populations, it will eventually equalize their allele frequencies
If not opposed by another mechanism of evolution, migration will homogenize allele frequencies
across populations completely
What are three population genetics phenomena - (Answer)Migration, genetic drift and nonrandom
mating
What does Fst represent - (Answer)Fst refers to a group of populations and reflects the variation in
allele frequencies among the populations in the group, taking a value from 0 to 1
Larger values represent more variation in allele frequency among populations
populations homogenized by gene flow will have similar allele frequencies and thus low Fst value
What did they find in the red bladder campions - (Answer)They found that there is less variation in
allele frequencies among populations of intermediate age than among young and old population
What doesnt genetic drift do - (Answer)Genetic drift does not lead to adaptation, but it does lead to
changes in allele frequencies. In the Hardy Weinberg model, genetic drift results from violation of the
assumption of infinite population size
