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Genetics Part 2 Practice Test 2021 Sem 2

Total questions: 61

Worksheet time: 5hrs 5mins

Name
Class
Date
1.
The variable the is changed on purpose is..
a)
Constant
b)
Control
c)
Independent Variable
d)
Dependent Variable
2.
What is the DEPENDENT variable (effect) in this experiment?
"Do tall people jump further than short people?"
a)
height of the person
b)
weight of the person
c)
how fast the person runs
d)
how far the person jumps
3.

A scientist is testing the impact of light and dark on the moth behavior by turning a light on and off. The DEPENDENT variable is...

a)

amount of light

b)

moth behavior/their reaction

c)

number of moths

4.
What is a factor that is measured for change in an experiment?
a)
control
b)
constant
c)
independent variable
d)
dependent variable
5.
What is the factor that an experimenter changes on purpose?
a)
Dependent Variable
b)
Independent Variable
c)
Constant
d)
Control
6.
Students used various temperatures of water to see which one dissolved candy faster. 
What was the Independent Variable?
a)
Amount of Candy
b)
Amount of Water
c)
Temperature of Water
d)
Time for Candy to Dissolve
7.
What is the mode of inheritance shown here?
a)
Autosomal Recessive
b)
Sex Linked
c)
Autosomal Dominant
8.

What is the mode of inheritance shown here?

a)

Autosomal Recessive

b)

Autosomal Dominant

c)

Sex Linked Recessive

9.
What is the mode of inheritance shown here?
a)
Autosomal Recessive
b)
Autosomal Dominant
c)
Sex Linked
10.

What type of heredity is shown in the pedigree?

a)

Autosomal Recessive

b)

Sex-Linked Recessive

c)

Autosomal Dominant

11.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
12.
What kind of trait is colorblindness if females can be carriers without having the disease?
a)
Regular trait
b)
Sex-linked trait
c)
Co-dominant trait
d)
Incomplete dominant trait
13.
If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?
a)
XbX
b)
XbXb
c)
XbYb
d)
XbY
14.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked Recessive
d)
Co-dominant
15.

Which term(s) best describes the inheritance of human blood types?

a)

incomplete dominance and multiple alleles

b)

codominance and epistasis

c)

codominance and multiple alleles

d)

incomplete dominance and codominance

16.

What are the 4 possible phenotypes for human blood type?

a)

Type A

b)

Type B

c)

Type BB

d)

Type AB

e)

Type O

17.
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
18.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

19.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

20.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross two speckled flowers.

a)

1 red, 2 speckled, 1 blue

b)

2 red, 2 blue

c)

2 blue, 2 speckled

d)

1 red, 1 speckled, 2 blue

21.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
22.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
23.
If you cross a black chicken with a white chicken, only checkered chickens would be produced.  What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
24.

What type of inheritance do two alleles have if their traits blend together?

a)

Incomplete dominance

b)

Codominance

25.

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

a)

0%

b)

25%

c)

50%

d)

100%

26.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
27.
If you cross a red snapdragon with a white snapdragon, only pink snapdragons will be produced.  What type of inheritance pattern does this follow?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
28.

In snapdragons, flower color exhibits incomplete dominance. When crossed, red (RR) and white (WW) flowers make pink flowers (RW). Complete a cross between a pink flower and a red flower. Find the phenotype ratio.

a)

1 red: 1 pink

b)

4 red: 0 pink

c)

4 pink: 0 white

d)

1 pink: 1 white

29.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
30.

A father has type AB blood and the mother has type O. What percentage of their offspring would you expect to have?

a)

Type A, 25%, Type B 25%, Type AB 25%, Type O 25%

b)

Type A 50%, Type B 25%, Type AB 25%, Type O 50%

c)

Type A blood 50%, Type B 50%, Type AB 0%, Type O Blood 0%

d)

Type A blood 100%

31.

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)

IB i

b)

IB IB

c)

ii

d)

type B blood

32.

if the father is type A and the mother is type B, in order for baby Sylvester to have the genotype ii, his parents must be?

a)

heterozygous

b)

homozygous

33.
In chickens, feather color is codominant.  If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?
a)
50%
b)
0%
c)
25%
d)
100%
34.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
Can't tell
35.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
36.

Look at this cross: XB XB x Xb Y

What proportion/percent of the male children are colorblind?

a)

100%

b)

75%

c)

25%

d)

0%

37.

H= normal blood clotting

h=hemophilia


XHXh x XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

38.
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
39.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
40.

Colorblindness is a sex-linked recessive trait. A colorblind woman marries a male with normal color vision. What is the percent chance of them having a color blind son?

a)

0%

b)

25%

c)

50%

d)

75%

41.

The woman who is colorblind marries a man with normal vision. What is the probability that their sons will be colorblind?

a)

0%

b)

25%

c)

50%

d)

100%

42.
Phenotype or Genotype?
Red Hair
a)
Phenotype
b)
Genotype
43.
Phenotype or Genotype?
dd
a)
Phenotype
b)
Genotype
44.

The 2 male sex chromsomes are _____.

a)

XY

b)

XX

45.

SELECT ALL THAT APPLY: Autosomes Chromosomes:

a)

Pair #23

b)

Determine whether you're male / female

c)

Pairs #1-22

d)

Every chromosome except sex chromosomes

46.

SELECT ALL THAT APPLY: Sex Chromosomes:

a)

Pair #23

b)

Determine whether you're male / female

c)

Pairs #1-22

d)

Every chromosome except sex chromosomes

47.

Which of the following is TRUE?

a)

Sex chromosomes determine gender

b)

Males have XY; Females have XX

c)

non-sex chromosomes are called autosomes

d)

all of these

48.

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

d)

none of these are correct

49.
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
50.
What blood type is the "universal donor" because it can be donated to anyone?
a)
A
b)
B
c)
AB
d)
O
51.
What type of blood can receive any type of blood?
a)
A
b)
B
c)
AB
d)
0
52.

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

a)

polygenic inheritance

b)

multiple alleles

c)

linked genes

d)

incomplete dominance

53.

What type of inheritance is determined by multiple genes and there can be a range of traits?

a)

Codominance

b)

Incomplete dominance

c)

Polygenic traits

54.
Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
55.
Hemophilia is a sex-linked recessive disorder. A woman with hemophilia marries an unaffected man whose father had hemophilia. What percentage of their daughters will have hemophilia?
a)
0%
b)
25%
c)
50%
d)
100%
56.
What is the gender of the individual whose karyotype is seen in the image?
a)
Male
b)
Female
57.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
58.
  1. Most humans have_______total chromosomes, including _______sex chromosomes and ________ autosomes.
a)

A. 46,44,2

b)

B. 46,2,44

c)

C. 44,46,2

d)

D. 44, 2, 46

59.
This karyotype is taken from a  ________.
a)
female with Turner's syndrome
b)
male with Down's syndrome
c)
female with Down's syndrome
d)
normal female
60.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
61.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above

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