Which condition provides the greatest support for a strong genetic
contribution to autism spectrum disorders (ASDs)?
Select one:
a. ASDs are more
... [Show More] likely to occur in children of parents who are over
35 at time of conception.
b. Concordance among dizygotic twins is 10%.
c. People with some neurologic disorders also have features of
ASDs.
d. Males are affected four times more frequently than females.
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The correct answer is: Concordance among dizygotic twins is 10%.
Question 2
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Which statement best describes the role of tumor suppressor genes
in cancer development?
Select one:
a. The presence of tumor suppressor genes increases the risk for
gene damage by environmental carcinogens.
b. Tumor suppressor genes reduce/suppress immune function,
increasing the risk for cancer development.
c. Tumor suppressor genes control or modify the activity of
oncogenes, reducing the risk for cancer development.
d. Tumor suppressor genes are a type of oncogene that is only
active in germ line cells and tissues.
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The correct answer is: Tumor suppressor genes control or modify the
activity of oncogenes, reducing the risk for cancer development.
Question 3
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How do genetic/genomic issues influence individual variation of the
response to a specific drug?
Select one:
a. Polymorphisms of genes encoding metabolizing enzymes
b. Age-related loss of alleles within the cells lining the intestinal
tract
c. Genetic-based behavior problems that promote poor adherence to
prescribed drug regimens
d. Single gene disorders that reduce the function of the kidneys or
the liver
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The correct answer is: Polymorphisms of genes encoding
metabolizing enzymes
Question 4
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What is the heritability estimate for addiction to alcohol in both
males and females?
Select one:
a. 10% to 20%
b. 50% to 60%
c. 20% to 40%
d. 60% to 80%
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The correct answer is: 50% to 60%
Question 5
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What type of genetic test provides information about an
asymptomatic person’s risk for having a child with a specific
autosomal recessive disorder in the future?
Select one:
a. Newborn screening
b. Carrier test
c. Predictive test
d. Diagnostic test [Show Less]