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| 1 | |
Genes
are segments of DNA that code for the _____. |
| | A) | trait of hair color |
| | B) | synthesis
of proteins |
| | C) | muscle contraction |
| | D) | the function of insulin |
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| 2 | |
Which of the following is not
true of chromosomes? |
| | A) | contain DNA |
| | B) | coated with histones |
| | C) | 46 in mitotic cells |
| | D) | visible
at all times |
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| 3 | |
The
genes for cystic fibrosis are located on chromosome number _____. |
| | A) | 4 |
| | B) | 7 |
| | C) | 17 |
| | D) | 21 |
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| 4 | |
Huntington disease is associated with chromosome _____. |
| | A) | 4 |
| | B) | 7 |
| | C) | 17 |
| | D) | 21 |
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| 5 | |
When
does the chromosome number reach 92? |
| | A) | never |
| | B) | prophase |
| | C) | before prophase |
| | D) | metaphase |
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| 6 | |
Persons with dark skin who produce
offspring with the same color have genes that are probably _____. |
| | A) | heterozygous
for melanin |
| | B) | different alleles |
| | C) | heterozygous for melanin enzymes |
| | D) | homozygous
for melanin enzymes |
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| 7 | |
Which
organ system is not significantly affected by Cystic fibrosis? |
| | A) | nervous |
| | B) | pulmonary |
| | C) | gastrointestinal |
| | D) | reproductive |
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| 8 | |
The term __________ refers to
having two different gene alleles. |
| | A) | homozygous |
| | B) | heterozygous |
| | C) | autosomal |
| | D) | karyotype |
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| 9 | |
Sickle cell genes are present
in _____% of the American population with central African ancestry. |
| | A) | 8 |
| | B) | 18 |
| | C) | 48 |
| | D) | 2 |
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| 10 | |
The
genes for sickle cell anemia are inherited as a form of _____. |
| | A) | heterozygous
recessive |
| | B) | autosomal recessive |
| | C) | incomplete dominance |
| | D) | codominance |
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| 11 | |
When
will a person with sickle cell trait develop symptoms? |
| | A) | every day |
| | B) | under hypoxia |
| | C) | never |
| | D) | exercising |
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| 12 | |
The
genes for the ABO blood types are _____. |
| | A) | alleles |
| | B) | incomplete
dominant |
| | C) | codominant |
| | D) | recessive |
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| 13 | |
Persons
with blood type B have the _____ agglutinogens (antigen). |
| | A) | A |
| | B) | B |
| | C) | A
and B |
| | D) | neither A or B |
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| 14 | |
Which
blood type could these parents not produce in their children, AO and BB? |
| | A) | B |
| | B) | AB |
| | C) | Rh+ |
| | D) | O |
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| 15 | |
The final height of a child is
determined by _____. |
| | A) | the height of the parents |
| | B) | the height of the grandparents |
| | C) | polygenic
inheritance |
| | D) | recessive inheritance |
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| 16 | |
Which
of the following affects the expression in an individual with a homozygous recessive
trait? |
| | A) | the health of the mother |
| | B) | disease in the father |
| | C) | diet |
| | D) | all
of these |
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| 17 | |
The result of meiosis is to produce _____. |
| | A) | the
zygote |
| | B) | 23 chromosomes |
| | C) | 46 chromosomes |
| | D) | oogonia |
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| 18 | |
Which term refers to the inheritance of traits that require
two genes? |
| | A) | phenotype |
| | B) | genotype |
| | C) | recessive |
| | D) | dominant |
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| 19 | |
When
a physician questions a patient about their family history, they are gathering
evidence to construct a___________. |
| | A) | diagnosis |
| | B) | prognosis |
| | C) | pedigree |
| | D) | Punnett square |
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| 20 | |
How
is familial hypercholesterolemia usually inherited? |
| | A) | incomplete dominance |
| | B) | codominant |
| | C) | recessive |
| | D) | sex-linked |
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| 21 | |
Diseases that display different
symptoms and signs for the same disease are displaying ____. |
| | A) | heterogeneity |
| | B) | pleiotropy |
| | C) | penetrance |
| | D) | polygenicity |
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| 22 | |
The
SRY gene causes expression of ____ chromosome genes. |
| | A) | X |
| | B) | Y |
| | C) | autosome |
| | D) | X or Y |
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| 23 | |
Traits only transferred from
fathers to their sons are associated with the ___ chromosome. |
| | A) | X |
| | B) | Y |
| | C) | number
13 |
| | D) | number 21 |
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| 24 | |
Which of these conditions is
usually not found in females? |
| | A) | blood clotting disorders |
| | B) | acromegaly |
| | C) | muscular
dystrophy |
| | D) | Duchenne dystrophy |
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| 25 | |
The growth of facial hair is
an example of ___________. |
| | A) | sex-linked inheritance |
| | B) | sex-limited trait expression |
| | C) | sex-influenced
inheritance |
| | D) | dominant genetics |
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| 26 | |
What
is the probability of there being a recessive gene in the gametes from a parent
who is Aa (assuming "a" is recessive)? |
| | A) | 10% |
| | B) | 25% |
| | C) | 50% |
| | D) | 75% |
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| 27 | |
Which
offspring result from Aa and aa parents? |
| | A) | all aa |
| | B) | all AA |
| | C) | AA,
Aa, Aa, aa |
| | D) | aa, aa, Aa, Aa |
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| 28 | |
The inheritance of maleness is caused by a _____ chromosome
pattern. |
| | A) | autosomal |
| | B) | Y |
| | C) | XY |
| | D) | XX |
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| 29 | |
Which
type of condition can only be passed from the father to his sons? |
| | A) | sex
linked recessive |
| | B) | sex linked dominant |
| | C) | holandric |
| | D) | autosomal |
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| 30 | |
Which of the following is not
an X-linked recessive condition? |
| | A) | hemophilia A |
| | B) | color blindness |
| | C) | von
Willebrand's |
| | D) | optic atrophy |
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| 31 | |
The condition _____ is characterized
by a deficiency of plasma thromboplastin component (factor IX). |
| | A) | hepatocarcinoma |
| | B) | microphthalmia |
| | C) | hemophilia
B |
| | D) | coloboma iridis |
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| 32 | |
Which term is correctly used
to describe all Down's person's? |
| | A) | aneuploidy |
| | B) | trisomy
21 |
| | C) | polyploidy |
| | D) | translocation |
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| 33 | |
Which
of the following is associated with Down's syndrome? |
| | A) | XO |
| | B) | XYY |
| | C) | 21,
21, 21 |
| | D) | trisomy 22 |
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| 34 | |
The term for prenatal genetic
testing using sloughed-off fetal cells is called ____. |
| | A) | AFP |
| | B) | amniocentesis |
| | C) | chorionic
villus sampling |
| | D) | CEA |
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| 35 | |
Which
of the following is not usually seen in Down's syndrome? |
| | A) | kidney
defects |
| | B) | heart defects |
| | C) | skeletal deformities |
| | D) | mental retardation |
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