BIO 201 Exam 3 – Questions With Expert Solutions
Which of the following is TRUE about mutations?
a) most healthy individuals have no mutations.
b) most somatic mutations are harmful
c) mutations occur in germ-line cells, but not in somatic cells
d) mutations that occur in breast tissue can be passed on to offspring
e) none of the above Correct Ans - e) none of the above
Which of the following in NOT a general pattern of variation in natural
populations?
a) all individuals are likely to carry new mutations
b) some variant types will likely occur more than once in the population
c) some variant types will be similar across different species
d) most variant phenotypes are harmful Correct Ans - d) most variant
phenotypes are harmful
Which of the following is TRUE about mutations?
a) environmental conditions determine which mutations are most likely to
occur
b) mutations are rare in nature because the cell's DNA machinery repairs
them
c) most new mutations in an individual will not be inherited by its offspring
d) toxic chemicals are a common cause of mutations in living organisms
e) radiation is the most common cause of mutations in living organisms
Correct Ans - c) most new mutations in an individual will not be inherited by
its offspring
Which of the following is FALSE about mutations?
a) environmental conditions determine which mutations are most likely to
occur
b) mutations are the origin of all genetic variation in natural populations
c) most new mutations in an individual will not be inherited by its offspring
d) toxic chemicals are nota common cause of mutations in living organisms
e) most mutations are due to errors in DNA replication that are not repaired
Correct Ans - a) environmental conditions determine which mutations are
most likely to occur
, When a new mutation occurs in a gamete cell and that gamete is involved in a
fertilization event, resulting in a new individual in the population, which of the
following is TRUE?
a) The individual will have the same alleles as both of its parents
b) there is a chance that the individual will pass on the mutation to offspring
c) some but not all of the individual's body cells will have the mutation
d) all of the individual's gametes will carry the mutation Correct Ans - b)
there is a chance that the individual will pass on the mutation to offspring
Which of the following is true about mutation as the "factory of variation
production"?
a) it is constantly occurring in all organisms undergoing cell division
b) it is an unpreventable process
c) it is originally responsible for the production of all new alleles
d) all of the above Correct Ans - d) all of the above
Where in the human body do the mutations that can be inherited by offspring
occur? Correct Ans - in the ovaries and testes
What is the DIRECT cause of MOST new mutations? Correct Ans - errors
in DNA replication
(T/F) Genetic variants that are now common first originated as common
variants in a large number of individuals. Correct Ans - False
(T/F) There is selective pressure for organisms to have few or no new
mutations in their genomes. Correct Ans - False
Which of the following is different in mouse populations in locations with dark
backgrounds compared to mouse populations in locations with light
backgrounds?
a) the frequency of mutations
b) the impact of transcription on phenotypes
c) the impact of translation on phenotypes
d) the role of fur color in mouse survival
e) none of the above Correct Ans - e) none of the above
A population of oak trees produces acorns with many different sizes. What
kind of selection is likely occurring if the smallest and the largest acorns have
Which of the following is TRUE about mutations?
a) most healthy individuals have no mutations.
b) most somatic mutations are harmful
c) mutations occur in germ-line cells, but not in somatic cells
d) mutations that occur in breast tissue can be passed on to offspring
e) none of the above Correct Ans - e) none of the above
Which of the following in NOT a general pattern of variation in natural
populations?
a) all individuals are likely to carry new mutations
b) some variant types will likely occur more than once in the population
c) some variant types will be similar across different species
d) most variant phenotypes are harmful Correct Ans - d) most variant
phenotypes are harmful
Which of the following is TRUE about mutations?
a) environmental conditions determine which mutations are most likely to
occur
b) mutations are rare in nature because the cell's DNA machinery repairs
them
c) most new mutations in an individual will not be inherited by its offspring
d) toxic chemicals are a common cause of mutations in living organisms
e) radiation is the most common cause of mutations in living organisms
Correct Ans - c) most new mutations in an individual will not be inherited by
its offspring
Which of the following is FALSE about mutations?
a) environmental conditions determine which mutations are most likely to
occur
b) mutations are the origin of all genetic variation in natural populations
c) most new mutations in an individual will not be inherited by its offspring
d) toxic chemicals are nota common cause of mutations in living organisms
e) most mutations are due to errors in DNA replication that are not repaired
Correct Ans - a) environmental conditions determine which mutations are
most likely to occur
, When a new mutation occurs in a gamete cell and that gamete is involved in a
fertilization event, resulting in a new individual in the population, which of the
following is TRUE?
a) The individual will have the same alleles as both of its parents
b) there is a chance that the individual will pass on the mutation to offspring
c) some but not all of the individual's body cells will have the mutation
d) all of the individual's gametes will carry the mutation Correct Ans - b)
there is a chance that the individual will pass on the mutation to offspring
Which of the following is true about mutation as the "factory of variation
production"?
a) it is constantly occurring in all organisms undergoing cell division
b) it is an unpreventable process
c) it is originally responsible for the production of all new alleles
d) all of the above Correct Ans - d) all of the above
Where in the human body do the mutations that can be inherited by offspring
occur? Correct Ans - in the ovaries and testes
What is the DIRECT cause of MOST new mutations? Correct Ans - errors
in DNA replication
(T/F) Genetic variants that are now common first originated as common
variants in a large number of individuals. Correct Ans - False
(T/F) There is selective pressure for organisms to have few or no new
mutations in their genomes. Correct Ans - False
Which of the following is different in mouse populations in locations with dark
backgrounds compared to mouse populations in locations with light
backgrounds?
a) the frequency of mutations
b) the impact of transcription on phenotypes
c) the impact of translation on phenotypes
d) the role of fur color in mouse survival
e) none of the above Correct Ans - e) none of the above
A population of oak trees produces acorns with many different sizes. What
kind of selection is likely occurring if the smallest and the largest acorns have
