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Genetics Review

Total questions: 42

Worksheet time: 51mins

Name
Class
Date
1.
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
2.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
3.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
4.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
5.
Which of the following is heterozygous
a)
Ww
b)
ii
c)
DD
d)
kk
6.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
7.
The physical appearance of a trait is known as the-
a)
genotype
b)
phenotype
c)
characteristics
d)
intelligence
8.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)
BB
b)
bb
c)
Bb
d)
bB
9.

This model of the cell cycle includes two arrows that each represent a process in the cycle.

What do the two arrows represent?

a)

Arrow 1 represents prophase, and Arrow 2 represents interphase.

b)

Arrow 1 represents mitosis, and Arrow 2 represents meiosis.

c)

Arrow 1 represents interphase, and Arrow 2 represents mitosis.

d)

Arrow 1 represents meiosis, and Arrow 2 represents prophase.

10.

Gametes produced by an organism contain a combination of genes from that organism. In every gamete, this combination is —

a)

the same because it is created from the same DNA

b)

the same because chromosomes are copied prior to meiosis

c)

different due to DNA replication prior to mitosis

d)

different due to independent assortment during meiosis

11.

A segment of a DNA strand is shown.

3’ AGGTCAGGT 5’

Which of these is the correct complementary DNA strand for the segment shown?

a)

5’ AGGTCAGGT 3’

b)

5’ ACCUGAGGU 3’

c)

5’ TGGACTGGA 3’

d)

5’ TCCAGTCCA 3’

12.

Which of the following correctly describes two steps of DNA replication?

a)

DNA Polymerase matches uracil to thymine and cytosine to guanine. Two identical DNA double helixes are produced.

b)

DNA Polymerase matches cytosine to thymine and uracil to guanine. Two separate but complementary single DNA strands are produced.

c)

DNA Polymerase matches adenine to thymine and cytosine to guanine. Two identical DNA double helixes are produced.

d)

DNA Polymerase matches uracil to thymine and adenine to guanine. Two separate but complementary single DNA strands are produced.

13.

What is the genotype ratio for this punnett square?

a)

1:2:1

b)

3:1

c)

4:0

d)

2:1:2

14.

What is the genotype ratio for this punnett square?

a)

1:2:1

b)

3:1

c)

4:0

d)

2:2

15.

What is the phenotype ratio for this punnett square?

a)

1:2:1

b)

3:1

c)

4:0

d)

2:2

16.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
17.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
18.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
19.
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
20.
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
21.
What is a possible phenotype of a child that results from a woman with type AB blood and a man with type A blood?
a)
OO
b)
type O
c)
AA
d)
type A
22.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
23.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
24.
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
25.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
26.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a female who is colorblind?
a)
XNXn
b)
XnXn
c)
XNXN
d)
XnY
27.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
28.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XBXB
d)
XbY
29.

Based on the following Punnett square, what percentage of the offspring will have this recessive disease?

a)

0%

b)

25%

c)

50%

d)

75%

30.

What does A indicate?

a)

A male that has the trait.

b)

A female that has the trait.

c)

A female that does not have the trait.

d)

A male that does not have the trait.

31.

What does B indicate?

a)

line that indicates someone likes each other

b)

line that indicates a marriage

c)

line that indicates a relationship of parents and children

d)

A male that does not have the trait.

32.

How many generations are represented in the pedigree?

a)

2

b)

3

c)

4

d)

5

33.

In the diagram, individual III-3 indicates

a)

a female with no freckles

b)

a male with no freckles

c)

a male with freckles

d)

a female with freckles

34.

What is the Genotype of individual I-1?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

35.

What is the Genotype of individual II-6?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

36.

Assuming a trait is X-LINKED RECESSIVE, what are the genotypes of an AFFECTED person?

a)

XAY

b)

XaY

c)

XAXA

d)

XAXa

e)

XaXa

37.

Assuming a trait is AUTOSOMAL RECESSIVE, what genotypes would make a person UNAFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

38.

Assuming a trait is X-LINKED DOMINANT, what are the genotypes of an UNAFFECTED person?

a)

XAY

b)

XaY

c)

XAXA

d)

XAXa

e)

XaXa

39.

Assuming a trait is X-LINKED RECESSIVE, what are the genotypes of an UNAFFECTED person?

a)

XAY

b)

XaY

c)

XAXA

d)

XAXa

e)

XaXa

40.

In a cross between a round(R)-yellow(Y) seeded plant and a wrinkled (r)- yellow(Y) seeded pea plant, green(y)-wrinkled (r) seeded offspring are produced.

(Next 2 questions will be about this information.)

a. What are the genotypes of parents?

a)

RrYy X rrYy

b)

RrYY X rrYy

c)

RrYy X RrYy

d)

RRYy X rrYy

e)

RRYy X RrYY

41.

A way to predict genetic probability using two different

sets of alleles on two different chromosomes.

a)

Co-Dominance

b)

Incomplete Dominance

c)

Monohybrid Cross

d)

Dihybrid Cross

42.

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

a)

9/16

b)

3/16

c)

1/16

d)

16/16

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