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Genetics Terminology Review
1
Which of the following words or phrases do geneticists use to describe an organism that
has two different alleles for a particular gene?
A
B
C
D
E
2
An allele that is expressed only when two copies are present is called a(n) ___________
allele.
A
B
C
D
E
3
traits.
alleles.
hybrids.
genotypes.
phenotypes.
Which of the following words describes an allele in a heterozygous individual that appears
to be the only one affecting the trait?
A
B
C
D
E
5
allele
dominant
heredity
recessive
monohybrid
For a particular gene, there are two different versions: "H" and "h." These alternative
forms of the same gene are known as
A
B
C
D
E
4
homozygous
heterozygous
homozygous dominant
heterozygous dominant
heterozygous recessive
allele
dominant
recessive
homozygous
none of the above
The word __________ specifically refers to an organism's observable traits and physical
characteristics.
A
B
C
D
E
genome
genetics
genotype
character
phenotype
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Genetics Terminology Review
6
Which of the following words or phrases do geneticists use to describe an organism that
has two identical alleles for a particular gene?
A
B
C
D
E
7
The word _________ specifically refers to an organism's genetic makeup.
A
B
C
D
E
8
homozygous
heterozygous.
homozygous recessive.
heterozygous dominant.
heterozygous recessive.
An organism with the genotype "hh" is
A
B
C
D
E
11
heterozygous.
homozygous dominant.
homozygous recessive.
heterozygous recessive.
none of the above
An organism with the genotype "Hh" is
A
B
C
D
E
10
genetics
genotype
character
dominance
phenotype
An organism with the genotype "HH" is
A
B
C
D
E
9
homozygous
heterozygous
homozygous dominant
homozygous recessive
heterozygous dominant
heterozygous.
homozygous dominant.
homozygous recessive.
heterozygous dominant.
heterozygous recessive.
In his breeding experiments, Mendel first crossed true-breeding _____ generation plants to
produce the _____ generation, which were then allowed to self-pollinate to generate the
_____ offspring.
A
B
C
D
E
P ... F1 ... F2
F ... P1 ... P2
P1 ... P2 ... F
F1 ... F2 ... F3
P1 ... P2 ... P3
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Genetics Terminology Review
12
If a homozygous dominant is crossed with a heterozygote for a given trait, the offspring
will be
A
B
C
D
E
13
In carrying out his breeding studies, Mendel examined characters that had which of the
following properties?
A
B
C
D
E
14
The traits varied in an either-or fashion.
The characters each were controlled by a single gene.
It was possible to isolate true-breeding varieties for each trait.
They were controlled by loci that were (or behaved as if they were) on
different chromosomes.
All of the above.
A cross between an individual pea plant with purple flowers and smooth pods and a plant
with white flowers and constricted pods is an example of a _______ cross.
A
B
C
D
E
15
all homozygous dominant.
present in a 9:3:3:1 ratio.
all homozygous recessive.
all of the dominant phenotype.
1/4 of the recessive phenotype.
test
difficult
dihybrid
trihybrid
monohybrid
An individual animal that inherited a dominant allele from its mother and a recessive allele
from its father is
A
B
C
D
E
diploid.
homozygous.
heterozygous.
Both A and B
Both A and C
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Genetics Terminology Review
Page 4
Answer Key : Genetics Terminology Review
Question:
1
2
3
4
5
6
7
8
9
10
11
12
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14
15
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Answer
B
D
B
B
E
A
B
B
B
C
A
D
E
C
E