Genetics Exam 2
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1. Which of the following describes incomplete domi- d. the heterozygous phe-
nance? notype is distinct from ei-
a. multiple alleles exist for a single gene ther homozygous parent
b. a phenotype resulting from the interaction of multi-
ple genes
c. both alleles are fully expressed in the heterozygote
d. the heterozygous phenotype is distinct from either
homozygous parent
e. one allele completely masks the effect of another
2. With which of the following would hemizygosity most e. X- linked inheritance
likely be associated
a. codominance
b. incomplete dominance
c. trihybrid crosses
d. sex-linked inheritance
e. X- linked inheritance
3. Sex-influence inheritance differs from sex-limited in- e. expression of the phe-
heritance in which of the following ways? notype occurs only in one
a. sex-influence inheritance is X-linked, but sex-limited sex in sex-limited inheri-
inheritance is not tance, but not in sex-influ-
b. the se are both terms for the same thing enced inheritance
c. codominance
d. sex-limited traits occur only in males
e. expression of the phenotype occurs only in one sex
in sex-limited inheritance, but not in sex-influenced
inheritance
4. A condition in which one gene pair masks the expres- d. epistasis
sion of a nonallelic gene pair is called
a. dominance
, Genetics Exam 2
Study online at https://quizlet.com/_gm9xzs
b. recessive
c. codominance
d. epistasis
e. additive alleles
5. Assume the at long fingers are inherited as a recessive b. 1/5
trait with 80% penetrance. Two people heterozygous
for long fingers mate. What is the probability that their
first child will have long fingers?
a. 3/5
b. 1/5
c. 1/4
d. 1/2
e. 3/4
6. In humans, the dominance relationship between the a. codominance
A and B alleles of the ABO blood groups gene is an
example of _______.
a. codominance
b. complete dominance
c. incomplete dominance
d. epistasis
e. Alzheimer disease
7. Male-patterned baldness is a _____ trait. a. sex influenced
a. sex influenced
b. sex linked
c. sex limited
d. y linked
e. none of the above
8. With regard to the ABO blood types in humans, deter- d. IBi and IAi
mine the genotype (respectively) of a male and female
Study online at https://quizlet.com/_gm9xzs
1. Which of the following describes incomplete domi- d. the heterozygous phe-
nance? notype is distinct from ei-
a. multiple alleles exist for a single gene ther homozygous parent
b. a phenotype resulting from the interaction of multi-
ple genes
c. both alleles are fully expressed in the heterozygote
d. the heterozygous phenotype is distinct from either
homozygous parent
e. one allele completely masks the effect of another
2. With which of the following would hemizygosity most e. X- linked inheritance
likely be associated
a. codominance
b. incomplete dominance
c. trihybrid crosses
d. sex-linked inheritance
e. X- linked inheritance
3. Sex-influence inheritance differs from sex-limited in- e. expression of the phe-
heritance in which of the following ways? notype occurs only in one
a. sex-influence inheritance is X-linked, but sex-limited sex in sex-limited inheri-
inheritance is not tance, but not in sex-influ-
b. the se are both terms for the same thing enced inheritance
c. codominance
d. sex-limited traits occur only in males
e. expression of the phenotype occurs only in one sex
in sex-limited inheritance, but not in sex-influenced
inheritance
4. A condition in which one gene pair masks the expres- d. epistasis
sion of a nonallelic gene pair is called
a. dominance
, Genetics Exam 2
Study online at https://quizlet.com/_gm9xzs
b. recessive
c. codominance
d. epistasis
e. additive alleles
5. Assume the at long fingers are inherited as a recessive b. 1/5
trait with 80% penetrance. Two people heterozygous
for long fingers mate. What is the probability that their
first child will have long fingers?
a. 3/5
b. 1/5
c. 1/4
d. 1/2
e. 3/4
6. In humans, the dominance relationship between the a. codominance
A and B alleles of the ABO blood groups gene is an
example of _______.
a. codominance
b. complete dominance
c. incomplete dominance
d. epistasis
e. Alzheimer disease
7. Male-patterned baldness is a _____ trait. a. sex influenced
a. sex influenced
b. sex linked
c. sex limited
d. y linked
e. none of the above
8. With regard to the ABO blood types in humans, deter- d. IBi and IAi
mine the genotype (respectively) of a male and female
