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Unit 6 Review: Genetics

Total questions: 40

Worksheet time: 45mins

Name
Class
Date
1.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
2.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
3.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
4.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
6.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
7.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
8.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
9.
Colorblindness is a recessive x-linked trait.
Which genotype represents a male with normal vision?
a)
XNXN
b)
XYN
c)
XNY
d)
XnY
10.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true?
a)
All sons will have hemophilia
b)
All daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
0% of sons have hemophilia but 100% of daughters are carriers
11.
The sex of a child is determined by
a)
whether the father's sperm contains an x or y chromosome
b)
whether the mother's egg contains an x or y chromosome
c)
the age of the parents
12.
The visual representation of an individual's chromosomes is a 
a)
phenotype
b)
genotype
c)
karyotype
d)
stereotype
13.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
14.
If a father is AA and a mother is AB, what is the probability for a child with AB blood? 
a)
0%
b)
25%
c)
50%
d)
75%
15.
What is the genotype of a person with type A blood, who had a father with type O blood?
a)
AB
b)
AO
c)
AA
d)
OO
16.
A woman has type B blood and her husband has type O blood.  What must be the woman's genotype, if they have a child with type O blood?
a)
BO
b)
BB
c)
OO
d)
type B
17.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
18.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
19.
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
20.

In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (Bb) what are the chances of having a chicken that is black and white?

a)

50%

b)

0%

c)

25%

d)

100%

21.

What is happening in cell #1?

a)

Prophase

b)

Metaphase

c)

Anaphase

d)

Telophase

22.

What is happening in cell #3?

a)

Prophase

b)

Metaphase

c)

Anaphase

d)

Telophase

23.

Which diagram show meiosis?

a)

The left

b)

The right

24.

When a white and red flower are crossed, all of the offspring are pink. When 2 pink flowers are crossed, what is the pheotypic ratio of the offspring?

a)

4:0

b)

1:2:1

c)

2:2

d)

3:4

25.

Because the gene for red-green color blindness is located on the X chromosome, it is NOT possible for a

a)

carrier mother to pass the gene on to her daughter

b)

carrier mother to pass the gene on to her son

c)

color blind father to pass the gene on to his daughter

d)

color blind father to pass the gene on to his son

26.

Skin color and eye color are both examples of ______________ traits.

a)

sex-linked

b)

simple dominance

c)

polygenic

d)

codominant

27.

On this chart, males are represented with _______.

a)

squares

b)

circles

c)

lines

28.

In the second row of circles and squares, what is the relationship between the squares?

a)

They are siblings.

b)

They are married.

c)

They are all parents.

29.
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
30.
Hemophilia is a x-linked disorder.  A woman is a carrier for the disorder.  Which is the correct genotype?
a)
Hh
b)
XHXh
c)
hh
d)
XhXh
31.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
32.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
33.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
34.
In which type of cells will mitosis occur?
a)
egg cells
b)
sperm cells
c)
jail cells
d)
Body cells except the sperm and egg cells
35.
When you start with 1 cell, at the end of mitosis, how many identical cells will you have?
a)
1
b)
2
c)
3
d)
4
36.
After meiosis is complete how many cells will there be?
a)
1
b)
2
c)
3
d)
4
37.

What is the correct order of protein synthesis?

a)

mRNA --> DNA --> Protein

b)

Protein --> DNA --> mRNA

c)

DNA --> Protein --> mRNA

d)

DNA --> mRNA --> Protein

38.

Someone with 3 chromosomes at the 21st spot has

a)

Klinefelters

b)

Turners

c)

Downs Syndrome

39.

Someone with the genotype X_

a)

Klinefelters

b)

Turners

c)

Downs Syndrome

40.

Someone with the genotype XXY

a)

Klinefelters

b)

Turners

c)

Downs Syndrome

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