BIOL 2500 chapter 27 mc
migration of a few random individuals from one population to a new area to establish a new population is an example of
founder effect
the formula p^2+2pq+q^2 is associated with which of the following
hardy-weinberg equilibrium
the accumulation of new mutations in a population is usually a ____ factor against the fitness of the population
negative
which of the following is not true concerning a population in eq according to the HW rule
selection is favoring the dominant allele
genetic drift has a greater influence on ___ populations
small
you are preparing to perform DNA fingerprinting by PCR for the first time. select the reagent that would result in complications in the interpretation of your results
PCR primers that anneal to the repetitive region of the microsatellites
which of the following factors would result in the allele frequency of a population not adding up to 1.0, as is the case in the HW rule
a population changing due to selection
a SNP would best be described as
a single nt difference between two DNA seq
the prevalence of the allele for sickle cell anemia in some populations is an example of
balancing selection
a gene that is found in less than 1% of a given population is called monomorphic
false
at eq, the allele and genotype frequencies of a population change over time
false
horizontal gene transfer is limited to between prokaryotic bacteria of the same species
false
in the calculation of HW equilibria in the context of nonrandom mating, random mating is represented by the factor f equal to 1
false
most natural populations are in a state of eq according to HW
false
mutations are the only source of genetic variation in a population
false
the allele pool is the sum of all the alleles in a population
false
the movement of alleles from one population to another is called population flow
false
the selection coefficient is the measure to which a phenotype is selected against
false
which of the following is true regarding a balanced polymorphism
frequency of alleles not changing overtime, homozygous condition for the alleles is not advantageous to organism, EX=sickle cell anemia
in this equation p^2+2pq+q^2=1, what does the term 2pq represent
genotype frequency of heterozygous individuals
which of the following types of selection favors the survival of individuals with the intermediate phenotype
stabilizing selection
horizontal gene transfer between individuals in a population, while not a mutation, is a source of genetic variation
true
human society favors outbreeding, or the mating of individuals that are genetically unrelated
true
in exon shuffling, the duplicated or rearranged exons appear as new domains in different genes
true
migration is a key evolutionary mechanism by which microevolution occurs
true
new genetic variation in a population is a critical aspect of microevolution
true
random genetic drift is due to chance events that alter the allele frequency in a population
true
the measure of the reproductive success of a genotype is called darwinian fitness
true
the probability that a gene will be altered by a mutation is called the mutation rate
true
the smallest difference in DNA seq between a gene in two individuals is a SNP
true
if the allele frequency of the dominant allele is 0.4, what value is used for the term p^2 in the equation p^2+2pq+q^2=1
0.16
in a given population of Drosophila, curly wings (c) is recessive to the WT condition of straight wings (c+). you isolate a population of 35 curly winged flies, 70 flies that are heterozygous for straight wings and 45 that are homozygous for straight wings. what is the total number of alleles in the gene pool
300
in a given population of drosophila, curly wings (c) is R to WT conditions of straight wings (c+) you isolate a population of 35 curly winged flies, 70 flies that are hetero, and 45 that are homo for straight. what is the frequency of alleles in this population
46.7% c, 53.3% c+
in a certain population, the frequency of allele A is 0.3 and the frequency of allele a is 0.7. the population inbreeds such that f=0.1. what is the frequency of each genotype in the population
AA:0.111, Aa: 0.378, aa: 0.511
which of the following is not a step to calculate a coefficient of inbreeding
determine the mutation rate
which of the following types of selection favors one extreme of a phenotypic distribution
directional selection
which type of selection would lead to two distinct phenotypes
disruptive selection
the characteristics of a given population over time are
dynamic
which of the following will alter the frequency of alleles in the population the least?
mutation
if two individuals of a population, who vary in their phenotype, preferentially mate, it is called
negative assortative mating
which of the following is not a characteristic by when a population is in eq according to HW eq
nonrandom mating
in humans, the gene for eye color is an example of a ___ trait
polymorphic
a group of individuals from the same species that occupy the same region and can interbreed with one another is the definition of a
population
the degree of relatedness of two members of a pedigree is calculated using
the inbreeding coefficient
the inbreeding coefficient (F) tells us what about an individual
the probability that they are homozygous due to inheritance from a common ancestor