Page 1 of 109
CCBC BIO 110 EXAM STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS LATEST UPDATED VERSION THIS
YEAR
Question: The effects of ______________________ can be almost completely overcome by
regulating the diet of the individual from infancy.
a) cystic fibrosis
b) sickle-cell disease
c) phenylketonuria (PKU)
d) Huntington's disease - CORRECT ANSWER✔✔c) phenylketonuria (PKU)
Question: Which of the following statements about independent assortment and segregation
is correct?
a) The law of segregation is accounted for by anaphase of mitosis.
b) The law of segregation requires describing two or more genes relative to one another.
c) The law of independent assortment requires describing two or more genes relative to one
another.
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d) The law of independent assortment is accounted for by observations of prophase I. -
CORRECT ANSWER✔✔c) The law of independent assortment requires describing two or more
genes relative to one another.
Question: Skin color in a certain species of fish is inherited via a single gene with four different
alleles. How many different types of gametes would be possible in this system?
a) 8
b) 4
c) 2
d) 16 - CORRECT ANSWER✔✔b) 4
Question: Height in humans generally shows a normal (bell-shaped) distribution. What type of
inheritance most likely determines height?
a) a combination of complete dominance and environmental factors
b) incomplete dominance
c) a combination of polygenic inheritance and environmental factors
d) a combination of multiple alleles and codominance
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e) a combination of epistasis and environmental factors - CORRECT ANSWER✔✔c) a
combination of polygenic inheritance and environmental factors
Q:A gene that affects the expression of a second gene is an example of __________________.
a) pleiotropy
b) codominance
c) epistasis
d) polygenic inheritance
e) incomplete dominance - CORRECT ANSWER✔✔c) epistasis
Question: __________ is an example of a character that is controlled by more than one gene (a
quantitative character) and demonstrates a continuum of phenotypes.
a) Pleiotropy
b) Polygenic inheritance
c) Epistasis
d) Codominance
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e) Incomplete dominance - CORRECT ANSWER✔✔b) Polygenic inheritance
Question: The gene controlling ear color in an organism known as a gizmo has two alleles that
exhibit incomplete dominance: CR, which codes for red ears; and CY, which codes for yellow
ears. Individuals that are homozygous for the CR allele have red ears, whereas the heterozygous
genotype produces orange ears. Those that are homozygous for the CY allele have yellow ears.
If two individuals with orange ears are crossed, what ratio of phenotypes should be expected in
the offspring?
a) 9:3:1, red:yellow:orange ears
b) 3:1, red:yellow ears
c) 1:2:1, red:orange:yellow ears
d) 1:2:1, red:yellow:orange ears
e) 1:3, red:yellow ears - CORRECT ANSWER✔✔c) 1:2:1, red:orange:yellow ears
Question: Mice with the genotypes BBCc and bbcc are crossed. The alleles for brown coat (b)
and no pigment (c) are recessive, and black coat (B) is dominant. What color of mice would NOT
be produced by this mating?
a) brown
CCBC BIO 110 EXAM STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS LATEST UPDATED VERSION THIS
YEAR
Question: The effects of ______________________ can be almost completely overcome by
regulating the diet of the individual from infancy.
a) cystic fibrosis
b) sickle-cell disease
c) phenylketonuria (PKU)
d) Huntington's disease - CORRECT ANSWER✔✔c) phenylketonuria (PKU)
Question: Which of the following statements about independent assortment and segregation
is correct?
a) The law of segregation is accounted for by anaphase of mitosis.
b) The law of segregation requires describing two or more genes relative to one another.
c) The law of independent assortment requires describing two or more genes relative to one
another.
, Page 2 of 109
d) The law of independent assortment is accounted for by observations of prophase I. -
CORRECT ANSWER✔✔c) The law of independent assortment requires describing two or more
genes relative to one another.
Question: Skin color in a certain species of fish is inherited via a single gene with four different
alleles. How many different types of gametes would be possible in this system?
a) 8
b) 4
c) 2
d) 16 - CORRECT ANSWER✔✔b) 4
Question: Height in humans generally shows a normal (bell-shaped) distribution. What type of
inheritance most likely determines height?
a) a combination of complete dominance and environmental factors
b) incomplete dominance
c) a combination of polygenic inheritance and environmental factors
d) a combination of multiple alleles and codominance
, Page 3 of 109
e) a combination of epistasis and environmental factors - CORRECT ANSWER✔✔c) a
combination of polygenic inheritance and environmental factors
Q:A gene that affects the expression of a second gene is an example of __________________.
a) pleiotropy
b) codominance
c) epistasis
d) polygenic inheritance
e) incomplete dominance - CORRECT ANSWER✔✔c) epistasis
Question: __________ is an example of a character that is controlled by more than one gene (a
quantitative character) and demonstrates a continuum of phenotypes.
a) Pleiotropy
b) Polygenic inheritance
c) Epistasis
d) Codominance
, Page 4 of 109
e) Incomplete dominance - CORRECT ANSWER✔✔b) Polygenic inheritance
Question: The gene controlling ear color in an organism known as a gizmo has two alleles that
exhibit incomplete dominance: CR, which codes for red ears; and CY, which codes for yellow
ears. Individuals that are homozygous for the CR allele have red ears, whereas the heterozygous
genotype produces orange ears. Those that are homozygous for the CY allele have yellow ears.
If two individuals with orange ears are crossed, what ratio of phenotypes should be expected in
the offspring?
a) 9:3:1, red:yellow:orange ears
b) 3:1, red:yellow ears
c) 1:2:1, red:orange:yellow ears
d) 1:2:1, red:yellow:orange ears
e) 1:3, red:yellow ears - CORRECT ANSWER✔✔c) 1:2:1, red:orange:yellow ears
Question: Mice with the genotypes BBCc and bbcc are crossed. The alleles for brown coat (b)
and no pigment (c) are recessive, and black coat (B) is dominant. What color of mice would NOT
be produced by this mating?
a) brown
