Name: 
 

Complex Inheritance Review



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which statement describes the structure of DNA?
a.
a single strand of amino acids
c.
a double strand of nucleotides
b.
a single strand of nucleotides
d.
a double strand of amino acids
 

 2. 

mc002-1.jpg
a.
A, G, A, G, T, C
c.
U, C, T, C, A, G
b.
T, C, T, C, A, G
d.
C, T, C, T, C, A
 

 3. 

Actinomyocin-D was found to be effective in preventing the growth of rapidly dividing tumor cells by blocking DNA replication.  Scientists discovered Actinomyocin-D  also caused side effects like hair loss and a decrease in the number of red blood cells.  Which statement best explains the reason that Actinomyocin-D caused the side effects?
a.
Actinomyocin-D alters the environment so that hair and red blood cells are killed.
c.
Actinomyocin-D targets tumor cells, and the side effects are due to the release of chemicals from the tumor cells.
b.
Actinomyocin-D affects all cell division, so healthy cells are also unable to divide
d.
Actinomyocin-D kills the cells that support the hair cells and red blood cells leading to the death of these cells.
 

 4. 

Growth rate, length of bones, muscle structure, and hormone levels may all affect human height.  Each of these factors is controlled by many different proteins in body cells.  What type of gene relationship controls human body height?
a.
polygenic
c.
codominant
b.
dominant
d.
incompletely dominant
 

 5. 

DNA is replicated during the cell cycle.  Which event is needed to ensure that the normal number of chromosomes is present in both daughter cells?
a.
G1 phase
c.
mitosis
b.
G2 phase
d.
cytokinesis
 

 6. 

mc006-1.jpg
a.
A
c.
C
b.
B
d.
D
 

 7. 

Hemophilia is a sex-linked genetic disease.  If a male with hemophilia and a homozygous normal female have a female child, what is the probability that the child will be a carrier for hemophilia?
a.
0%
c.
50%
b.
25%
d.
100%
 

 8. 

In humans, the allele for having a straight thumb is dominant to the allele for having a curved thumb.  A male is homozygous dominant for straight thumbs, and a female has curved thumbs.  What is the probability that their offspring has curved thumbs?
a.
0%
c.
50%
b.
25%
d.
100%
 

 9. 

In snapdragons, if white flowers are crossed with red flowers, all the offspring have pink flowers.  When two pink snapdragons are crossed, some offspring have white flowers, some have red flowers, and some have pink flowers.  Which inheritance pattern do snapdragon flowers exhibit?
a.
sex-linked trait
c.
incomplete dominance
b.
polygenic trait
d.
codominance
 

 10. 

Baldness is the loss of human hair on the head and is a recessive sex-linked trait.  a male with the recessive genotype and a female heterozygous for the genotype have children.  What is the probability that a female child will inherit the baldness trait?
a.
0%
c.
50%
b.
25%
d.
100%
 

 11. 

The gene for flower color in some plants displays incomplete dominance.  In one plant species, the genotypes (RR) yield red petals, (rr) yield white petals, and (Rr) yield pink flowers.  What is the probability a cross between two plants heterozygous for flower color produce pink-flowering offspring?
a.
0%
c.
75%
b.
50%
d.
100%
 

 12. 

Chronic myeloid leukemia is caused by a chromosomal mutation.  An example of this mutation is shown in the diagram below.
mc012-1.jpg
What type of mutation causes chronic myeloid leukemia?
a.
deletion
c.
inversion
b.
duplication
d.
translocation
 

 13. 

Why does an inversion mutation on a chromosome in an egg cell tend to cause more severe genetic disorders than a point mutation in a gene in an egg cell?
a.
The point mutation of a single gene to produce a new protein is not possible.
c.
The inversion mutation can directly alter many traits while the point mutation can directly alter only one.
b.
The point mutation of a single gene to produce a genetic disorder is not possible.
d.
The inversion mutation is passed on to daughter cells while the point mutation is repaired during mitosis.
 

 14. 

Some American farmers are growing crops with seeds that have been genetically modified to release substances toxic to weeds.  These modified crops reduce the need to spray crops with weed-killing chemicals.  The concern about the use of genetically modified seeds is the chance that the weeds could become resistant to the toxin released by the crops.  Scientists have discovered toxin-resistant weeds in areas that are growing genetically modified crops of soybeans and cotton.  How might genetically modified crops affect agriculture in the United Stated?
a.
Genetically modified crops could contaminate the soil with toxins.
c.
Genetically modified crops could increase food prices an cause American farmers to lose money.
b.
Genetically modified crops could cause weeks to become a difficult problem to control.
d.
Genetically modified crops could be the future of agriculture, and resistant weeds will be an accepted side effect.
 

 15. 

The table below shows the alleles responsible for blood types in humans.   (1st image-example from EOC practice test, 2nd image from textbook)
mc015-1.jpg              blood groups
What is the probability that a man who is heterozygous for blood type B and a woman with blood type AB could have a child with blood type O?
a.
0%
c.
50%
b.
25%
d.
100%
 

 16. 

A guinea pig breeder owns a pure-breeding black male (BB) and a pure-breeding white female (bb).  What is the probability that offspring from these two guinea pigs will exhibit the black fur phenotype?
a.
25%
c.
75%
b.
50%
d.
100%
 

 17. 

Meiosis produces daughter cells as shown in the diagram.
mc017-1.jpgWhat stage produces the haploid condition of the four daughter cells?
a.
Replication
c.
Division 1
b.
Recombination
d.
Division 2
 

 18. 

Sickle-cell disease is a genetic disorder that is caused by a DNA mutation that exchanges one base for another, which changes one amino acid in hemoglobin.  What is this type of mutuation?
a.
deletion
c.
insertion
b.
frameshift
d.
point
 



 
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