Chapter 14

Instructions

Choose your answers from a-d by clicking the radio button next to each choice and then press 'Submit' to get your score.

Enzyme assay can be used to identify carriers of:

a) Cystic fibrosis.

b) Fragile X syndrome.

c) Oculocutaneous albinism.

d) Tay-Sachs disease.

Question 2

The maternal serum level of alpha-fetoprotein (AFP) is lower than average in which situation?

a) Down syndrome

b) Exomphalos

c) Neural tube defects

d) Twin pregnancies

Question 3

Which of the following diagnostic techniques is of no value for the diagnosis of neural tube defects?

a) Amniocentesis

b) Chorion villus sampling (CVS)

c) Maternal serum screening

d) Ultrasonography

Question 4

The risk for miscarriage associated with amniocentesis is approximately ____.

a) 1 in 10

b) 1 in 50

c) 1 in 100 to 1 in 200

d) 1 in 1000

Question 5

Which of the following findings on prenatal ultrasound examination would not raise suspicion of a chromosome abnormality?

a) Duodenal atresia

b) Holoprosencephaly

c) Hydrops fetalis

d) Monozygotic twins