Worksheets7 PreQuiz Genetic Inheritance
Total questions: 28
Worksheet time: 25mins
Name
Class
Date
1.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
2.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
3.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
4.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
5.
If something is heterozygous, it is also...
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
6.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
7.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
8.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
9.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
10.
A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
a)
TT and tt
b)
TT and Tt
c)
Tt and Tt
d)
TT and TT
11.
A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are
a)
I(A)i and I(B)I(B)
b)
I(B)I(B) and I(A)I(A)
c)
I(A)i and I(B)i
d)
I(A)I(B) and ii
12.
A cross of a red cow with a white bull produces all road offspring. This type of inheritance is known as
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
"breed time:
13.
What pattern of inheritance is shown in this image?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
14.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
15.
An example of polygenic inheritance is...
a)
Skin Color
b)
hitch hikers thumb
c)
blood types
16.
If a male has an affected x chromosome for a sex-linked trait such as colorblindness, where did he get the chromosome from?
a)
His father
b)
His mother
17.
Hemophilia is a sex-linked recessive trait found on the x chromosome. Complete a cross between a woman who is a carrier and a man who is normal.
What are the chances, if they have a daughter, that she is a carrier?
What are the chances, if they have a daughter, that she is a carrier?
a)
100%
b)
75%
c)
50%
d)
25%
18.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
19.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
20.
Huntington's disease is an autosomal dominant disorder. How many children did individuals I-1 and I-2 have?
a)
2
b)
4
c)
6
d)
8
21.
A circle that is not shaded represents
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
22.
Why do all the daughters in Generation II carry the colorblind gene?
a)
Because mom passed on the gene.
b)
Because dad passed on the X chromosome.
c)
Because their brother has it.
d)
Because their brother gave it to them.
23.
Which gender can be carriers of colorblindness and not have it?
a)
Just males
b)
Just females
c)
Both genders
24.
If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
25.
What is the purpose of meiosis?
a)
repair damaged tissue
b)
replace dead cells
c)
to grow
d)
to make gametes (sex cells)
26.
A process in which homologous chromosomes cross over each other & exchange DNA is known as:
a)
anaphase
b)
cytokinesis
c)
crossing-over
d)
ETC
27.
According to the Law of Segregation, alleles are separated during the process of _____________.
a)
Mitosis
b)
Meiosis
c)
Osmosis
d)
Translation
28.
What gametes can be made from this parents genes?
AaBb
AaBb
a)
AA, aa, BB, bb
b)
AB, ab
c)
A, a, B, b
d)
AB, Ab, aB, ab
100 %
