Chapter 13:
Patterns of Inheritance
Practice Test
1.
Suppose a trait has two alleles, M and m. If one parent is homozygous for the recessive trait, what is that parent's genotype?
a.
MM
b.
mm
c.
MMm
d.
Mm
Hint
2.
What is a segment of DNA whose sequence of nucleotides codes for a specific functional product?
a.
a genome
b.
a factor
c.
a trait
d.
a gene
Hint
3.
What is the ratio of dominant to recessive traits that Mendel found in the F2 generation of garden peas?
a.
1 to 2
b.
9 to 3
c.
1 to 3
d.
3 to 1
Hint
4.
What is a trait that seems to disappear in the F1 generation?
a.
the assorted trait
b.
the codominant trait
c.
the recessive trait
d.
the dominant trait
Hint
5.
What is the principle that explains how homologous chromosomes separate into different gametes during meiosis?
a.
principle of incomplete dominance
b.
principle of segregation
c.
principle of independent assortment
d.
principle of sex-linked genes
Hint
6.
When red-flowered snapdragons are crossed with white-flowered snapdragons, all the F1 plants have pink flowers, a color intermediate between the colors of the parents. What type of inheritance is this an example of?
a.
sex-linked genes
b.
incomplete dominance
c.
multiple alleles
d.
codominance
Hint
7.
What is the genetic makeup of an organism?
a.
its genotype
b.
its parental type
c.
its karyotype
d.
its phenotype
Hint
8.
What is the appearance or the observable characteristics of an organism?
a.
its genotype
b.
its phenotype
c.
its parental type
d.
its karyotype
Hint
9.
What is a trait that is only carried on an X chromosome?
a.
sex-linked trait
b.
antibody
c.
codominance
d.
incomplete dominance
Hint
10.
Sometimes the phenotypes of both parents are expressed in the offspring. What type of inheritance is this an example of?
a.
incomplete dominance
b.
sex-linked genes
c.
codominance
d.
multiple alleles
Hint
