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Transcript 
Inheritance
Practice Test
Which chromosomes are not considered
homologous?
• A. autosomal
• B. X chromosomes
• C. X and Y chromosomes
• D. None of these
Mendel’s principle of segregation refers to:
• A. separation of alleles for a particular trait during
gamete formation
• B. independent behavior of alleles for different
traits during gamete formation
• C. difference of alleles for a trait in a heterozygous
genotype
• D. expression of phenotype in an individual
The genotypes that cannot be determined by
inspecting the phenotypes of offspring of a cross
are:
• A. homozygous dominant and homozygous
recessive
• B. codominant and incomplete dominance
• C. codominant and homozygous recessive
• D. homozygous dominant and heterozygous
dominant
Genetic traits of seeds are: G=long, W= wrinkled,
Y=yellow, R= ribbed; g=short, w=smooth, y=white,
and r=grooved
Which of the following is a possible genotype
for a short, wrinkled, yellow, grooved seed?
a. ggWwyyrr
b. GGWWyyRr
c. GgWwYYRr
d. ggWwYYrr
What is the result of a cross between Tt x tt?
• A. 100% tall
• B. 75% tall, 25% short
• C. 50% tall, 50% short
• D. 100% short
Which of these is demonstrated by blood
types? (CATA)
• A. incomplete dominance
• B. multiple genes
• C. codominance
• D. x-linked traits
• E. multiple alleles
The Pace family has seven children, one son and
six daughters. What is the chance that the eighth
will be a daughter?
• A. 1/12
• B. 1/128
• C. 1/8
• D. ½
• E. impossible to say
Diabetes is a recessive disorder. Two non-diabetic
people have a 75% chance of having a nondiabetic child.
• What are the genotypes of these parents?
• A. DD, Dd
• B. Dd, Dd
• C. DD, dd
• D. dd, dd
Which type of inheritance shows the most
variety of phenotypes?
• A. codominance
• B. complete dominance
• C. polygenic traits
• D. incomplete dominance
• E. sex-linked traits
Disease A shows incomplete dominance. Homozygous recessive
individuals have the disease, homozygous dominant individuals
do not have the disease, and heterozygous individuals have a
mild form of the disease. A man with the mild form of the
disease and a woman with the disease have children. What is
the probability that their children will NOT have any form of
Disease A?
• A. 0%
• B. 25%
• C. 50%
D. 75%
E. 100%
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