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
Juliet tells a nurse that she has three aunts (two on her father’s side, ages
42 and 56, and one on her mother’s side, age 62) who were diagnosed with
breast cancer. She asks if she should have genetic testing. What should
the nurse tell her?
Select one:
a. “Because no men in your family are affected, it is not inherited cancer so
you don’t need mammograms or any special screening practices.”
b. “Your family history indicates a high risk and you should definitely have
genetic testing.”
c. “Because your aunts were older when they got breast cancer, it was
probably sporadic and you should just have regular mammograms like
everyone else.”
d. “Your family history may indicate an increased risk for breast cancer and
a genetic counselor could help determine whether you could benefit from
genetic testing.”
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The correct answer is: “Your family history may indicate an increased risk
for breast cancer and a genetic counselor could help determine whether
you could benefit from genetic testing.”
Question 3
How are malignant tumors different from benign tumors?
Select one:
a. Benign tumors have totally normal features, and malignant tumors have
totally abnormal features.
b. Malignant tumors grow by expansion, and benign tumors grow by
invasion.
c. Malignant tumors lose plasma membranes, and benign tumors continue
to produce them.
d. Benign tumors retain parental cell functions, and malignant tumors lose
parental cell functions.
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The correct answer is: Benign tumors have totally normal features, and
malignant tumors have totally abnormal features.
Question 4
A patient has a very high concentration of insulin receptors on cells that
require insulin for glucose to enter. How should insulin dosages be
adjusted for this patient to have blood glucose levels within the normal
range?
Select one:
a. Insulin dosages should be given more frequently because the drug will
be eliminated at a faster rate.
b. Insulin dosages should be increased because cells will be less sensitive
to the presence of active insulin
c. Insulin dosages should be decreased because the drug will exert its
actions at lower concentrations.
d. Insulin dosages should be given less frequently because the drug will
remain bound to receptors longer.
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The correct answer is: Insulin dosages should be decreased because the
drug will exert its actions at lower concentrations.
Question 5
What is the result of a mutation occurring in a suppressor gene?
Select one:
a. Gain of a new function
b. Increased “errorprone” DNA repair
c. Loss of an existing function
d. Increased unequal “crossing over” during meiosis I
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The correct answer is: Loss of an existing function [Show Less]