Division of Genetics and Metabolism

Test module: Genetic Hearing Loss Overview

Estimated time to complete: 5 min.
Number of questions: 6

Your name:

1. What is the lifetime risk of hearing loss?

1 in 200
1 in 100
1 in 20
1 in 10
1 in 2

Note: You must check your answer after each selection.

2. What proportion of prelingual deafness is genetic?

100%
80%
60%
40%
20%

3. Which of the following is NOT a class of deafness?

DFN
DFNA
DFNB
DFNX

4. Which of the following is NOT an environmental cause of hearing loss?

Toxoplasmosis
Antibiotics
Alcohol
Meningitis
Low Birth Rate

5. What is the most common gene responsible for hereditary hearing loss?

Connexin 21
Connexin 26
Connexin 31
Connexin 36
Connexin 41

6. In autosomal recessive inheritance, you are most likely to see:

a mother and child who are deaf
a father and child who are deaf
a child who is deaf without a family history of deafness
a child who is deaf with distant relatives who are deaf
a child who is deaf with a maternal uncle who is deaf

helix graphic