BIOL 1010 Final Exam Practice Test Questions - Brooklyn
College Questions With Complete Solutions
A karyotype of one of your skin cells would reveal a total of 46
chromosomes. How many of these are maternally inherited non-
sex chromosomes?
a. 23
b. 20
c. 46
d. 22
e. 24 Correct Answers d. 22
A man with the autosomal recessive disorder phenylketonuria
(PKU) and a woman without PKU have a son named Peter, who
does not have PKU. Peter is curious about whether his mother is
a carrier for PKU. Which of the following facts would allow him
to know?
a. Peter's maternal grandfather has PKU.
b. Peter's sister does not have PKU.
,c. Neither of Peter's maternal grandparents have PKU.
d. Peter's own daughter has PKU.
e. Peter submits his own blood sample to a local genotyping lab,
which establishes that he is a carrier for PKU. Correct Answers
a. Peter's maternal grandfather has PKU.
A population consists of a group of organisms
a. of the same species living in a specific geographic area that
have the potential to interbreed.
b. of the same species.
c. consisting of 5000 or more individuals.
d. residing in a geographic area that measures one square mile or
greater.
e. living in a specific geographic locale. Correct Answers a. of
the same species living in a specific geographic area that have
the potential to interbreed.
,A population's environment sometimes changes too quickly for
natural selection to adapt the individuals in the population to the
environment. In these situations
a. the rate of somatic mutations increases.
b. disruptive selection will occur.
c. evolution ceases to operate in the population.
d. extinction occurs during the following generation.
e. the individuals' instincts can no longer be trusted to elicit
behavior that maximizes reproductive success. Correct Answers
e. the individuals' instincts can no longer be trusted to elicit
behavior that maximizes reproductive success.
A rare, X-linked dominant condition in humans, congenital
generalized hypertrichosis, is marked by excessive hair growth
all over a person's body. Which of the following statements
about this condition is INCORRECT?
, a. Any woman that inherits an X-chromosome containing this
allele will develop this condition.
b. Males with this condition almost always have a more severe
phenotype due to the fact that women usually have at least one
normal allele that dilutes the effect of the mutated allele.
c. The daughter of a woman with this disease has just slightly
more than a 50% chance of also having this condition.
d. The son of a woman with this condition has a 100% chance of
also having this condition.
e. All of the above statements about congenital generalized
hypertrichosis are correct. Correct Answers d. The son of a
woman with this condition has a 100% chance of also having
this condition.
A white-flowered plant is crossed with a red-flowered plant, and
all of the offspring have pink flowers. This could be an example
of:
a. complete dominance.
b. polygenic inheritance.
College Questions With Complete Solutions
A karyotype of one of your skin cells would reveal a total of 46
chromosomes. How many of these are maternally inherited non-
sex chromosomes?
a. 23
b. 20
c. 46
d. 22
e. 24 Correct Answers d. 22
A man with the autosomal recessive disorder phenylketonuria
(PKU) and a woman without PKU have a son named Peter, who
does not have PKU. Peter is curious about whether his mother is
a carrier for PKU. Which of the following facts would allow him
to know?
a. Peter's maternal grandfather has PKU.
b. Peter's sister does not have PKU.
,c. Neither of Peter's maternal grandparents have PKU.
d. Peter's own daughter has PKU.
e. Peter submits his own blood sample to a local genotyping lab,
which establishes that he is a carrier for PKU. Correct Answers
a. Peter's maternal grandfather has PKU.
A population consists of a group of organisms
a. of the same species living in a specific geographic area that
have the potential to interbreed.
b. of the same species.
c. consisting of 5000 or more individuals.
d. residing in a geographic area that measures one square mile or
greater.
e. living in a specific geographic locale. Correct Answers a. of
the same species living in a specific geographic area that have
the potential to interbreed.
,A population's environment sometimes changes too quickly for
natural selection to adapt the individuals in the population to the
environment. In these situations
a. the rate of somatic mutations increases.
b. disruptive selection will occur.
c. evolution ceases to operate in the population.
d. extinction occurs during the following generation.
e. the individuals' instincts can no longer be trusted to elicit
behavior that maximizes reproductive success. Correct Answers
e. the individuals' instincts can no longer be trusted to elicit
behavior that maximizes reproductive success.
A rare, X-linked dominant condition in humans, congenital
generalized hypertrichosis, is marked by excessive hair growth
all over a person's body. Which of the following statements
about this condition is INCORRECT?
, a. Any woman that inherits an X-chromosome containing this
allele will develop this condition.
b. Males with this condition almost always have a more severe
phenotype due to the fact that women usually have at least one
normal allele that dilutes the effect of the mutated allele.
c. The daughter of a woman with this disease has just slightly
more than a 50% chance of also having this condition.
d. The son of a woman with this condition has a 100% chance of
also having this condition.
e. All of the above statements about congenital generalized
hypertrichosis are correct. Correct Answers d. The son of a
woman with this condition has a 100% chance of also having
this condition.
A white-flowered plant is crossed with a red-flowered plant, and
all of the offspring have pink flowers. This could be an example
of:
a. complete dominance.
b. polygenic inheritance.
