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CCBC BIO 110 EXAM 3 |2025-2026 LATEST UPDATED| REAL EXAM
QUESTIONS AND ANSWERS | 100% RATED CORRECT | 100% VERFIED
| ALREADY GRADED A+
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 - (answer)c) epistasis
__________ 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
e) Incomplete dominance - (answer)b) Polygenic inheritance
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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 - (answer)c) 1:2:1, red:orange:yellow ears
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
b) white
c) black - (answer)a) brown
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An individual that is heterozygous for an allele and that exhibits a phenotype intermediate
between that of the two homozygous alternatives is an example of _____.
a) polygenic inheritance
b) pleiotropy
c) codominance
d) incomplete dominance
e) epistasis - (answer)d) incomplete dominance
What possible blood types could offspring have if their two parents have the blood types A and
AB, respectively?
a) AB only
b) A, B, AB, and O
c) A and O only
d) A and B only
e) A, B, and AB only - (answer)e) A, B, and AB only
In water snakes, body color is controlled by two alleles that display incomplete dominance.
Snakes with the BB genotype are brown, those with the Bb genotype are gray, and individuals
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with the bb genotype are green. If a brown snake and a gray snake are crossed, what ratio of
phenotypes should be expected in the offspring?
a) 1:1, gray:green
b) 1:2:1, brown:gray:green
c) 1:1, brown:gray
d) 1:1:1, brown:gray:green
e) 1:1, brown:green - (answer)c) 1:1, brown:gray
You are examining a trait which shows three distinct phenotypes, with the phenotype of
heterozygotes expressing both alleles seen in the homozygotes. This is an example of:
a) Codominance.
b) Complete dominance.
c) Incomplete dominance.
d) Pleiotrophy. - (answer)a) Codominance.
Pedigrees reveal that a trait shows a dominant pattern of inheritance if that trait generally
_______.
a) skipped generations
b) was lethal
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Comprehensive Study Guide- Solved Exam Q&A
1|Page
CCBC BIO 110 EXAM 3 |2025-2026 LATEST UPDATED| REAL EXAM
QUESTIONS AND ANSWERS | 100% RATED CORRECT | 100% VERFIED
| ALREADY GRADED A+
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 - (answer)c) epistasis
__________ 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
e) Incomplete dominance - (answer)b) Polygenic inheritance
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Comprehensive Study Guide- Solved Exam Q&A
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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 - (answer)c) 1:2:1, red:orange:yellow ears
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
b) white
c) black - (answer)a) brown
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An individual that is heterozygous for an allele and that exhibits a phenotype intermediate
between that of the two homozygous alternatives is an example of _____.
a) polygenic inheritance
b) pleiotropy
c) codominance
d) incomplete dominance
e) epistasis - (answer)d) incomplete dominance
What possible blood types could offspring have if their two parents have the blood types A and
AB, respectively?
a) AB only
b) A, B, AB, and O
c) A and O only
d) A and B only
e) A, B, and AB only - (answer)e) A, B, and AB only
In water snakes, body color is controlled by two alleles that display incomplete dominance.
Snakes with the BB genotype are brown, those with the Bb genotype are gray, and individuals
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with the bb genotype are green. If a brown snake and a gray snake are crossed, what ratio of
phenotypes should be expected in the offspring?
a) 1:1, gray:green
b) 1:2:1, brown:gray:green
c) 1:1, brown:gray
d) 1:1:1, brown:gray:green
e) 1:1, brown:green - (answer)c) 1:1, brown:gray
You are examining a trait which shows three distinct phenotypes, with the phenotype of
heterozygotes expressing both alleles seen in the homozygotes. This is an example of:
a) Codominance.
b) Complete dominance.
c) Incomplete dominance.
d) Pleiotrophy. - (answer)a) Codominance.
Pedigrees reveal that a trait shows a dominant pattern of inheritance if that trait generally
_______.
a) skipped generations
b) was lethal
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