Practice Quiz for Autosomal Abnormalities

No. of Questions= 10
INSTRUCTIONS: To answer a question, click the button in front of your choice. A response will appear in the window below the question to let you know if you are correct. Be sure to read the feedback. It is designed to help you learn the material. You can also learn by reading the feedback for incorrect answers.

1 Compared to sex chromosome abnormalities, autosomal ones are:
a)  less common
b)  more common
c)  about equally common
2 Down syndrome is due to an abnormality of chromosome pair number:
a) 3
b) 11
c) 21
3 Which of the following is characteristic of people with Down syndrome?
a) They are all severely mentally retarded--they have a mental age level of a 3-7 year old normal child
b) They frequently have other related medical problems.
c) They have a longer expected life span than average.
4 An epicanthic fold is.
a) a fold of skin over the inner corner of each eyelid that causes the eyes to have a "slanted" appearance
b) a large ridged tongue that rolls over a protruding lower lip
c) neither of the above
5 Which of the following types of chromosomal abnormalities are most commonly associated with Down syndrome?
a) translocation
b) trisomy
c) mosaicism
6 Recent data suggest that by age 35, nearly 100% of people with Down syndrome develop:
a) Alzheimer syndrome
b) increased fertility
c) fragile-X syndrome
7 The risk of giving birth to a Down syndrome child _____________ with the age of the mother.
a) increases
b) decreases
c) does not change
8 Which of the following statements is true regarding Down syndrome?
a) It is the most common cause of mental retardation in North America.
b) There is no connection between the age of a father and the likelihood that his child will inherit Down syndrome.
c) Amniocentesis is now usually recommended for women 35 and over because of their significantly higher risk of giving birth to a Down syndrome child.
9 Which of the following statements about Down syndrome is true?
a) The majority of mothers giving birth to Down syndrome children are still in their 20's.
b) Women who have already had a Down syndrome child are at a lower risk of having another child with this problem.
c) Women who have Down syndrome are at a lower risk of having Down syndrome children.
10 Which of the following statements is true?
a) Down syndrome is the only known autosomal abnormality.
b) Most men with Down syndrome are fertile.
c) In the past, Down syndrome was referred to as Mongoloidism.



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