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Chapter 9 Test
Test Description: Test Review
Instructions: Answer all questions to get your test result.
1) Female inheritance patterns cannot be analyzed by simply studying the X chromosome because
A
the X chromosome is obtained from both father and mother.
B
one X chromosome is deactivated in females.
C
the X chromosome is too large to analyze effectively
D
the X chromosome sometimes exchanges genetic information with the Y chromosome
2) Any gene located on a sex chromosome
A
is called a sex-linked gene.
B
will exhibit pleiotropy.
C
will exhibit codominance.
D
is called a recessive gene.
3) The mechanism that breaks the linkage between linked genes is
A
codominance.
B
independent assortment.
C
crossing over.
D
pleiotropy.
4) A person with AB blood illustrates the principle of
A
polygenic inheritance.
B
incomplete dominance.
C
codominance
D
pleiotropy.
5) A carrier of a genetic disorder who does not show symptoms is most likely to be ________ to transmit it to offspring.
A
heterozygous for the trait and unable
B
heterozygous for the trait and able
C
homozygous for the trait and able
D
homozygous for the trait and unable
6) A testcross is
A
a mating between an individual of unknown genotype and an individual heterozygous for the trait of interest.
B
a mating between two individuals of unknown genotype.
C
a mating between an individual of unknown genotype and an individual homozygous recessive for the trait of interest.
D
a mating between two individuals heterozygous for the trait of interest.
7) Mendel's law of independent assortment states that
A
genes are sorted concurrently during gamete formation.
B
independent sorting of genes produces polyploid plants under some circumstances.
C
chromosomes sort independently of each other during mitosis and meiosis.
D
each pair of alleles segregates independently of the other pairs of alleles during gamete formation.
8) A monohybrid cross is
A
a breeding experiment in which the parental varieties have only one trait in common.
B
the second generation of a self-fertilized plant.
C
a breeding experiment in which the parental varieties have only one prominent trait.
D
a breeding experiment in which the parental varieties differ in only one character.
9) Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as
A
hybrids.
B
true-breeding.
C
the F2 generation.
D
monohybrid crosses.
10) ________________ is the scientific study of heredity.
A
True-breeding
B
Pedigree
C
Genetics
D
Selective breeding
11) This person is known as the father of genetics.
A
Hippocrates
B
Gregor Mendel
C
Aristotle
D
Pangenesis
12) True-breeding parental plants are the
A
hybrids
B
P generation
C
F2 generation
D
F1 generation
13) Referring to Mendel's pea plant experiments, the hybrid offspring are the
A
F1 generation
B
purebreds
C
P generation
D
F2 generation
14) A cross of F1 plants produces an
A
F2 generation
B
P generation
C
F1 generation
D
all purebred offspring
15) ___________ is the mating between an individual of unknown genotype and a homozygous recessive individual.
A
selective breeding
B
testcross
C
punnett square
D
true-breeding
16) A dihybrid cross should produce the following phenotypic ratio:
A
3:1
B
9:3:3:1
C
8:4:2:2
D
1:1:1:1
17) This shows the four possible combinations of alleles that could occur when these gametes combine.
A
phenotype
B
law of independent assortment
C
genotype
D
punnett square
18) A heritable feature that varies among individuals, such as flower color is
A
a trait
B
dominant
C
a character
D
a genotype
19) Each variant for a character, such as purple or white flowers is
A
a characteristic
B
genotype
C
a trait
D
dominant
*select an answer for all questions
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