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Beckman Bio: Genetics Review

Total questions: 51

Worksheet time: 1hrs 1mins

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.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
3.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
4.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
5.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
6.

having two of the same alleles for the trait (sometimes called purebred or true breeding).

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

7.

Two heterozygous brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

a)

0 %

b)

25%

c)

50%

d)

75%

8.

In pea plants, green seed color (G) is dominant to yellow seed color (g).

The genotype for a yellow plant is...

a)

GG

b)

Gg

c)

gg

d)

all of the choices result in yellow

9.
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
10.

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

d)

75% short and 25% tall

11.
Red/green color blindness is a recessive trait.  A woman who is a carrier for this allele marries a normal-vision male.  What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
12.

In horses, white hair (W) is dominant over brown hair (w).

If you cross a homozygous dominant white-haired horse and a horse that has brown hair, what fraction of the offspring would be expected to have white hair?

a)

none

b)

3/4

c)

1/2

d)

all

13.
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
14.
A woman who is heterozygous for blood type A has children with a man who is heterozygous for blood type B. What is the chance they will have a child that has blood type O? 
a)
1/4
b)
2/4
c)
0
d)
4/4
15.
Which trait in humans is controlled by multiple alleles and codominance? 
a)
Hair texture
b)
Blood type
c)
Eyelash length
d)
Height 
16.

The reason why each parent only donates one allele to their offspring is due to

a)

one parent is favored over the other parent

b)

both parents donate half of their chromosomes during fertilization

c)

one parent has more recessive alleles

d)

some genes don't get passed down

17.
A cow with white hair has offspring with a bull that has red hair. All of their offspring are red and white. This type of inheritance is known as
a)
incomplete dominance 
b)
codominance 
c)
multiple alleles
d)
dominance 
18.
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
19.
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
20.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
21.
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.
22.
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
23.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
24.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
25.
Phenotype is
a)
what an organism looks like
b)
letters of the organism
c)
what the organism does
d)
found by amniocentesis 
26.

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

27.
What blood type is the "universal donor" because it can be donated to anyone?
a)
A
b)
B
c)
AB
d)
O
28.

What blood type can receive blood from all blood types?

a)

A

b)

B

c)

AB

d)

0

29.
Would a person with type B blood be able to receive type AB blood from a transfusion?
a)
yes, because they both have the B antigen
b)
yes, because the person has B antibodies
c)
no, because the person has A antibodies
d)
no, because the person has B antibodies
30.
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
31.
Mike has type O blood. Mike can receive blood from someone who has Type A or Type B.
a)
True
b)
False
32.
Jim has type AB blood. His dad could be type O.
a)
True
b)
False
33.

Snap dragon color is an 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

34.
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
35.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
36.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
37.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
38.

What sex has an X and a Y chromosome?

a)

male

b)

female

c)

all of the above

39.
Phenylketonuria (PKU) is inherited as a recessive condition. A man with PKU marries a woman without any alleles for PKU. What is the probability that their child will inherit PKU?
a)
0%
b)
25%
c)
50%
d)
75%
40.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
41.

What does a filled in square represent?

a)

Homozygous recessive female

b)

Dominant male

c)

Homozygous recessive male

d)

Dominant female

42.

What does an open circle represent?

a)

Dominant male

b)

Dominant female

c)

Homozygous recessive female

d)

Heterozygous male

43.

In some carnations, flower color exhibits codominance. When crossed, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.

Complete a cross between a speckled flower and a red flower. Find the phenotype ratio.

a)

1 red: 1 speckled

b)

4 red: 0 speckled: 0 white

c)

0 red: 4 speckled: 0 white

d)

0 red: 2 speckled: 2 white

44.

What does heredity mean?

a)

Scientific study of heredity

b)

When sperm and egg join in producing

c)

Many generations that have the same trait

d)

the passing of traits from parents to offspring

45.

What type(s) of antibodies are found in a person with AB blood?

a)

None

b)

Anti-B

c)

Anti-A and Anti-B

d)

Anti-A,

46.

What type(s) of antibodies are in a person who is Type A blood?

a)

Anti-A and Anti-B

b)

Nothing

c)

Anti-B

d)

Anti-A

47.

What is produced by your body in response to foreign antigens, such as the wrong type of blood?

a)

agglutinates

b)

clotting factors

c)

phagocytes

d)

antibodies

48.

Sarah has blood type B, what antigen is present?

a)

None

b)

A

c)

B

d)

A and B

49.

Grant has blood type A, what antigen is present?

a)

None

b)

A

c)

B

d)

A and B

50.

Alex has blood type O, what antigen is present?

a)

None

b)

A

c)

B

d)

A and B

51.

Rachel has blood type AB, what antigen is present?

a)

None

b)

A

c)

B

d)

A and B

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