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WorksheetsGenetics Review
Total questions: 30
Worksheet time: 18mins
Name
Class
Date
1.
Mendel’s green pea pods showed the dominant trait while yellow pea pods showed the recessive trait. This is an example of:
a)
codominance
b)
complete dominance (typical Mendelian genetics)
c)
incomplete dominance
d)
sex-linked traits
2.
The human blood types A, B, and AB are examples of this type of genetic phenomenon.
a)
codominance
b)
complete dominance (typical Mendelian genetics)
c)
incomplete dominance
d)
sex-linked traits
3.
Snapdragon flowers having red (RR), white (WW), and pink (RW) flowers is an example of:
a)
codominance
b)
complete dominance (typical Mendelian genetics)
c)
incomplete dominance
d)
sex-linked traits
4.
Which of the following genotypes shows the recessive trait being expressed?
a)
FF
b)
Ff
c)
ff
d)
fF
5.
Which of the following genotypes is heterozygous or hybrid?
a)
FF
b)
Ff
c)
ff
d)
none of these
6.
Which of the following is an allele?
a)
TT
b)
Tt
c)
tt
d)
t
7.
Which of the following is a gene?
a)
TT
b)
T
c)
t
d)
tall
8.
Which of the following is a pure bred or homozygous genotype?
a)
TT
b)
Tt
c)
tt
d)
Both TT and tt
9.
This person is considered the father of genetics and is known for the experiments he did with pea plants.
a)
Charles Darwin
b)
Sir Isaac Newton
c)
Gregor Mendel
d)
Aristotle
10.
The color of two imaginary fish (one blue and the other yellow) is controlled by a single gene. What would the offspring look like if incomplete dominance occurred?
a)
Blue
b)
Green
c)
Blue and Yellow Striped
d)
Yellow
11.
The color of two imaginary fish (one blue and the other yellow) is controlled by a single gene. What would the offspring more likely look like if complete dominance occurred?
a)
Blue
b)
Green
c)
Blue and Yellow Striped
d)
Yellow only
12.
The color of two imaginary fish (one blue and the other yellow) is controlled by a single gene. What would the offspring more likely look like if codominance occurred?
a)
Blue
b)
Green
c)
Blue and yellow striped
d)
Yellow
13.
An organism with different letters (Aa) is said to be this
a)
heterozygous
b)
homozygous
c)
dominant
d)
Both heterozygous and dominant
14.
Describes an allele that is fully expressed whenever the allele is present in an individual (The upper case letter in the Aa genotype.)
a)
dominant
b)
homozygous
c)
recessive
d)
homologous
15.
One set of instructions for an inherited trait.
a)
gene
b)
genotype
c)
phenotype
d)
allele
16.
Describes an allele that will be hidden unless the organism is homozygous (bb) for the trait
a)
dominant
b)
homozygous
c)
recessive
d)
homologous
17.
One of the alternative forms of a gene that govern a characteristic such as hair color (Ex. C or c)
a)
an allele
b)
a gene
c)
a genotype
d)
a phenotype
18.
A condition in which two alleles is expressed such that the phenotype of a heterozygous individual is an intermediate (blend) of the phenotypes of the two homozygous parents.
a)
complete dominance (typical Mendelian genetics)
b)
codominance
c)
incomplete dominance
d)
sex-linked traits
19.
The entire genetic makeup of an organism (Ex. Bb and what their genes actually are).
a)
allele
b)
genotype
c)
phenotype
d)
gene
20.
A condition in which two alleles are expressed such that the phenotype of a heterozygous individual is a combination of the phenotypes of the two homozygous parents.
a)
complete dominance (typical Mendelian genetics)
b)
codominance
c)
incomplete dominance
d)
sex-linked trait
21.
The passing of genetic material (DNA) from parent to offspring is called
a)
genetics
b)
heredity
c)
biology
d)
gene therapy
22.
The typical type of inheritance that Mendel observed which has two contrasting traits (Ex. Purple vs. White Flowers).
a)
complete
dominance (typical Mendelian genetics)
dominance (typical Mendelian genetics)
b)
codominance
c)
incomplete dominance
d)
sex-linked trait
23.
An organism’s physical appearance or other detectable characteristic (what they look like).
a)
gene
b)
genotype
c)
phenotype
d)
allele
24.
An organism with the same letters- uppercase or lowercase (Ex. AA or aa) is said to be this.
a)
heterozygous
b)
homozygous
c)
diseased
d)
hybrid
25.
A pure dominant father and a pure recessive mother are expecting a baby. What are their chances of having a blonde-haired child if B = brown and b = blonde?
a)
0%
b)
25%
c)
50%
d)
75%
26.
An albino rabbit mates with another albino rabbit. Both parents are homozygous recessive or pure bred for albinism. How many of their offspring will be albino? (A = dark fur and a = albino)
a)
0%
b)
25%
c)
75%
d)
100%
27.
Two tall pea plants produce short offspring. How can you explain this? (T = tall and t = short)
a)
Both parents are tt.
b)
One parent is TT and the other is Tt.
c)
Both parents are Tt.
d)
This is not possible.
28.
A hybrid dwarf and a normal person have a baby. What are the chances that the child will be normal if D = dwarfism and d = normal? This type of dwarfism called achondroplasia is inherited by a dominant gene. The chances that the child will be normal is _____ %.
a)
0%
b)
25%
c)
50%
d)
100%
29.
A couple has a child born with Tay-Sachs disease. Tay-Sachs is a recessive condition (t) and kills all victims by age 3 – 5 because an enzyme necessary for fat reabsorption in the brain is not present. What probable genotypes do the parents have?
a)
TT and TT
b)
TT and tt
c)
tt and tt
d)
Tt and Tt
30.
How many alleles do you inherit from each parent for a specific trait?
a)
none
b)
1 from each parent
c)
2 from each parent
d)
4 from each parent
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