Chapter 11:
Human Genetics
Practice Test
1.
If a normal father and a mother who is a carrier of the allele for hemophilia have children, what is the probability that they will have a daughter who has hemophilia?
a.
25%
b.
0%
c.
50%
d.
100%
Hint
2.
What two kinds of ions are involved in cystic fibrosis?
a.
chloride and iron ions
b.
iron and hydrogen ions
c.
sodium and sulfur ions
d.
sodium and chloride ions
Hint
3.
Which of these diseases is caused by a dominant gene?
a.
sickle-cell anemia
b.
cystic fibrosis
c.
Huntington's disease
d.
hemophilia
Hint
4.
What is the condition in which heterozygotes have an advantage over both types of homozygotes?
a.
Down syndrome
b.
color blindness
c.
homozygote inferiority
d.
heterozygote superiority
Hint
5.
If a normal father and a mother who is a carrier of the allele for hemophilia have children, what is the probability that they will have a son who has hemophilia?
a.
0%
b.
100%
c.
25%
d.
50%
Hint
6.
What is a picture of human chromosomes?
a.
ultrasound
b.
karyotype
c.
chorionic biopsy
d.
fetoscope
Hint
7.
In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?
a.
gene therapy
b.
chorionic villus biopsy
c.
fetoscopy
d.
amniocentesis
Hint
8.
Hemophilia is due to a recessive allele on the ____ chromosome.
a.
Y
b.
21st
c.
22nd
d.
X
Hint
9.
What is the disease in which blood does not clot normally?
a.
Huntington's disease
b.
hemophilia
c.
cystic fibrosis
d.
sickle-cell anemia
Hint
10.
The presence of three of one kind of chromosome is known as _________ .
a.
karyotyping
b.
hemophilia
c.
translocation
d.
trisomy
Hint
