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WorksheetsGenetics Review
Total questions: 39
Worksheet time: 1hrs 2mins
Name
Class
Date
1.
What does the Law of Segregation state?
a)
When sex cells form, the two alleles that determine a trait will end up on different gametes.
b)
Only one of the alleles will be expressed
c)
The genes will occur randomly on a chromosome
d)
Certain traits are not sex-linked
2.
When a yellow flower is crossed with a blue flower, co-dominance can be seen by the production of which of the following?
a)
Blue flowers
b)
Yellow flowers
c)
Blue flowers with yellow tips
d)
Green flowers
3.
Which set of parents can most likely produce a child with type O blood?
a)
Both parents are homozygous for type B blood
b)
Both parents are homozygous with type A blood
c)
one parent with heterozygous type A blood, and the other parent with type B blood
d)
one parent with heterozygous type A blood, and the other parent with type O blood
4.
What would be the genotype for individual 6?
a)
XBXb
b)
XbXb
c)
XBY
d)
XbY
5.
What kind of trait is being traced in the following image?
a)
Autosomal dominant
b)
Autosomal recessive
c)
Sex-linked recessive
d)
Sex-linked dominant
6.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
7.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
8.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
9.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
10.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
11.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
12.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
13.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XrY
a)
female red
b)
female white
c)
male red
d)
male white
14.
In humans, skin tone is caused by 3 genes, each with 2 alleles. This is an example of
a)
codominance
b)
incomplete dominance
c)
polygenic inheritance
d)
multiple alleles
15.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
16.
Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?
a)
BB
b)
Bb
c)
bb
d)
All of the above
17.
If two heterozygous individuals are crossed, what percent of their offspring are also expected to be heterozygous?
a)
0
b)
50
c)
75
d)
100
18.
What principle states that during gamete formation genes for different traits separate without influencing each other�s inheritance?
a)
principle of dominance
b)
principle of independent assortment
c)
principle of probabilities
d)
principle of segregation
19.
What principle states that during gamete formation genes for different traits separate without influencing each other�s inheritance?
a)
principle of dominance
b)
principle of independent assortment
c)
principle of probabilities
d)
principle of segregation
20.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
21.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
22.
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
23.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
24.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?
Which genotype represents a male with normal vision?
a)
XNXN
b)
XnXn
c)
XNY
d)
XnY
25.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a female who is colorblind?
Which genotype represents a female who is colorblind?
a)
XNXn
b)
XnXn
c)
XNXN
d)
XnY
26.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XBXB
d)
XbY
27.
Mike has type O blood. Mike can receive blood from someone who has Type A or Type B.
a)
True
b)
False
28.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
29.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
codominance
d)
epistasis
30.
A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?
a)
Yes
b)
No
31.
A personal with type AB blood has which genotype?
a)
AA
b)
AB
c)
IAIA
d)
IAIB
32.
If a trait shows up more commonly in men than women it is probably
a)
not inherited
b)
on the x chromosome and dominant
c)
on the x chromosome and recessive
d)
on a normal body chromosome
33.
What is the probability that the offspring are homozygous recessive?
a)
0%
b)
25%
c)
50%
d)
75%
e)
100%
34.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
35.
How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?
a)
There is no difference
b)
The heterozygous genotype has a unique phenotype
c)
There is no heterozygous genotype
d)
There is only one phenotype regardless of genotype.
36.
In which inheritance pattern are heterozygous individuals a blend of the dominant and recessive phenotypes?
a)
sex-linked inheritance
b)
complete dominance
c)
codominance
d)
incomplete dominance
37.
What do the shaded shapes represent in a pedigree chart?
a)
normal individuals
b)
individuals who have the trait
c)
carriers
d)
dominant individuals
38.
True or False: Men can NEVER be "carriers" for recessive sex-linked traits because they only have one X chromosome.
a)
True
b)
False
39.
An individual with XX chromosomes would be ____________.
a)
Male
b)
Female
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