Chapter 14:
Heredity
Practice Test
1.
What do identical twins share that no one else on Earth has?
a.
the same mother
b.
identical DNA
c.
the same color of eyes
d.
the same father
Hint
2.
When a trait that is present seems to disappear, what is it called?
a.
recessive
b.
dominant
c.
heterozygote
d.
pure
Hint
3.
What do you call an organism with one dominant gene and one recessive gene?
a.
pure dominant
b.
heterozygote
c.
dominant/recessive
d.
pure recessive
Hint
4.
Which of the following is NOT an example of a trait?
a.
hair color
b.
eye color
c.
shape of your nose
d.
color of clothes you like to wear
Hint
5.
Each of the pea plants studied by Mendel had two different forms. What was he observing in his experiments?
a.
recessive genes
b.
dominant genes
c.
specialization
d.
variation
Hint
6.
What do geneticists call a specific location on a chromosome that controls a certain trait?
a.
a gene
b.
a trait
c.
a heterozygote
d.
the nucleus
Hint
7.
Crossing short pea plants with short pea plants always produces short pea plants. What did Mendel call these genes?
a.
true
b.
pure
c.
dominant
d.
recessive
Hint
8.
DNA is composed of four bases. Which of the following is NOT a base?
a.
cytosine
b.
chromosine
c.
adenine
d.
thymine
Hint
9.
If you wanted to show the history of a trait from one generation to the next, what could you do?
a.
look at old photos
b.
draw a Punnett square
c.
draw a pedigree
d.
obtain medical records
Hint
10.
What causes Down's syndrome?
a.
a dominant gene
b.
a recessive gene
c.
the presence of an extra chromosome
d.
poor diet
Hint
11.
How would you write the trait for pure tallness?
a.
tT
b.
TT
c.
tt
d.
Tt
Hint
12.
Sickle cells are an inherited trait. What happens if you have sickle-cell anemia?
a.
The cells often get stuck in the capillaries.
b.
You don't get enough oxygen to your tissues.
c.
Your red blood cells look different.
d.
all of the above
Hint
13.
If you wanted to predict whether your children would have a particular trait, what could you do?
a.
draw a Punnett square
b.
ask your parents
c.
draw a pedigree
d.
all of the above
Hint
14.
Why is DNA important?
a.
It sends messages to your brain.
b.
It contains the master codes that instruct all your cells in their daily jobs.
c.
It is responsible for oxygen transport.
d.
all of the above
Hint
15.
How do geneticists represent the gene for a dominant trait?
a.
with a nucleus
b.
with a small letter
c.
It is responsible for oxygen transport.
d.
none of the above
Hint
