Chapter 12:
Patterns of Heredity and Human Genetics
Practice Test
1.
The gene for white eyes in fruit flies is located only __________.
a.
on the Y chromosome
b.
in males
c.
on the autosomes
d.
on the X chromosome
Hint
2.
Patterns of inheritance that are explained by Mendel`s experiments are __________.
a.
simple Mendelian inheritance
b.
multiple alleles
c.
codominance
d.
sex linkage
Hint
3.
Trisomy of chromosome 21 results in a condition called __________.
a.
Turner syndrome
b.
Down syndrome
c.
Klinefelter syndrome
d.
XYY male
Hint
4.
The ratio expected when crossing two pink snapdragons is ___________.
a.
3:01
b.
1:02:01
c.
9:3:3:1
d.
1:01
Hint
5.
Color-blindness and hemophilia are two examples of human __________.
a.
polygenic inheritance
b.
multiple alleles
c.
sex linkage
d.
inheritance patterns
Hint
6.
If a cow has both red hairs and white hairs, the inheritance pattern for the hair colors is likely to be __________.
a.
codominance
b.
polygenic inheritance
c.
multiple alleles
d.
incomplete dominance
Hint
7.
Tay-Sachs disease attacks the __________ system.
a.
circulatory
b.
respiratory
c.
nervous
d.
reproduction
Hint
8.
How many different kinds of gametes can be produced by an organism that has the genotype AaBbCc?
a.
3
b.
8
c.
16
d.
6
Hint
9.
A human with blood type I
B
i would have the phenotype __________.
a.
A
b.
O
c.
AB
d.
B
Hint
10.
Human blood types are one example of __________ traits.
a.
multiple allelic
b.
codominant
c.
incompletely dominant
d.
multiple gene
Hint
11.
The type of inheritance that results in many alleles contributing small, but equal portions of a trait is _________.
a.
multiple alleles
b.
polygenic inheritance
c.
sex linkage
d.
Mendelian inheritance
Hint
12.
Parakeets can be many colors, but any one parakeet has only two alleles for color. This indicates that the inheritance pattern of color in parakeets is __________.
a.
codominant
b.
incomplete
c.
polygenic
d.
multiple allelic
Hint
13.
Internal differences in males and females are partially results of __________.
a.
polygenic inheritance
b.
chromosome number
c.
hormones
d.
multiple alleles
Hint
14.
If a pedigree shows that a human trait seems to skip generations the trait is probably __________.
a.
recessive
b.
polygenic
c.
dominant
d.
sex linked
Hint
15.
The actual genes that an organism has are its __________.
a.
gender type
b.
genotype
c.
physical appearance
d.
phenotype
Hint
