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Reporting Category 2: Mechanisms of Genetics

Total questions: 120

Worksheet time: 6hrs 0mins

Name
Class
Date
1.
the base that pairs with Thymine in DNA
a)
adenine
b)
guanine
c)
helicase
d)
nucleotide
2.
the process of making a copy of DNA
a)
transcription
b)
double helix
c)
DNA replication
d)
replication fork
3.
The shape of DNA.
a)
double helix
b)
nucleotide
c)
DNA polymerase
d)
single stranded
4.
Which shows the correct complementary base pairing for DNA?
a)
C-A, T-G
b)
A-G, C-T
c)
C-G, U-A
d)
T-A, G-C
5.
If we think of DNA as a ladder, which parts are the steps of the ladder?
a)
the nitrogenous base pairs
b)
the phosphate-sugar backbone
c)
the genes
d)
the phospholipid bilayer
6.

Which is in order from largest to smallest structure?

a)

chromosome, DNA strand, gene, nucleotide

b)

chromosome, gene, DNA strand, nucleotide

c)

gene, DNA strand, chromosome, nucleotide

d)

DNA strand, chromosome, gene, nucleotide

7.

What are the parts of a nucleotide?

a)

phosphate, sugar, base

b)

A, T, G, C

c)

Nucleic Acids

d)

two base pairs connected

8.

Which of the following is correctly matches: ATT GTA CGA

a)

TAA CAT GCT

b)

ATT GTA CGA

c)

TAA GTA TCG

d)

GCC ACG TAC

9.

What do genes do?

a)

make proteins

b)

store energy

c)

create covalent bonds

d)

create hydrogen bonds

10.

The 'backbone' or 'ribbon' of the DNA strand is made of:

a)

phosphate and sugar

b)

phosphate only

c)

phosphate and base

d)

sugar and base

11.

Hydrogen bonds occur:

a)

on the ribbon (between the sugar)

b)

between the bases

c)

only between A & T

d)

only between G & C

12.

What is this a picture of?

a)

nucleotide

b)

DNA strand

c)

chromosome

d)

gene

13.

antiparallel stands of nucleotides run in:

a)

opposite directions

b)

the same direction

c)

base pairs

d)

chromosomes

14.
Which enzyme is needed to unwind and unzip the double helix in order to make a copy of it?
a)
DNA helicase
b)
DNA ligase
c)
DNA replicase
d)
DNA polymerase
15.
The mRNA codon UGA would correspond with which tRNA anticodon?
a)
ACT
b)
ACU
c)
UCU
d)
ACA
16.
A three base code for an amino acid is called a/an
a)
nucleotide
b)
deoxyribose sugar
c)
codon
d)
phosphate
17.
If a DNA molecule consists of 29% Guanine, how much cytosine will it contain?
a)
29%
b)
58%
c)
21%
d)
I have no idea.
18.
If a DNA molecule contains 44% for A and T combined, how much G will be present?
a)
66%
b)
56%
c)
28%
d)
22%
19.
Where does transcription take place?
a)
ribosome
b)
cytoplasm
c)
nucleus
d)
protein
20.
When DNA is copied into mRNA it is called
a)
protein synthesis
b)
translation
c)
transcription
d)
replication
21.
tRNA carries an anticodon on one side and a/an __________ on the other side.
a)
amino acid
b)
nucleic acid
c)
protein
d)
mRNA codon
22.
Any change in the DNA is called a/an
a)
mistake
b)
exon
c)
mutation
d)
intron
23.
Where does mRNA meet up with tRNA to translate the code into amino acids?
a)
ribosome
b)
nucleus
c)
cytoplasm
d)
ribose sugar
24.
This type of substitution codes for a stop codon
a)
Missense
b)
Nonsense
c)
Silent
d)
Deletion
25.
If you are missing or have an extra base  at the end of your mutated DNA . What type of mutation occurred?
a)
Substitution
b)
Frameshift
c)
Duplication 
d)
Insertion
26.
A type of substitution in which no  amino acids change is called 
a)
Missense
b)
Nonsense
c)
Silent
d)
Deletion
27.
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
a)
Substitution
b)
Deletion
c)
Insertion
d)
Inversion
28.
Normal-
GAG-CTC-GAC-AGA
Mutant
GAG CTC-CAC-AGA
a)
no mutation
b)
substitution
c)
insertion
d)
deletion
29.
Original: ATC CAT
Mutation: ATC GCAT
What mutation occurred?
a)
deletion
b)
insertion
c)
silent
d)
transverse
30.
Are all mutations bad?
a)
Yes
b)
No
31.
Original: A A U U G G C C
Mutated: A U U U G G C C
What kind of mutation occurred?
a)
Substitution
b)
Addition
c)
Deletion
d)
Frameshift
32.

Which type of mutation is MOST LIKELY to cause the greatest disruption?

a)

Frameshift

b)

Silent

c)

Point

33.
A T T T G A G C C- Original
    A T T G A G C C  - Mutated
The example above is an example of a :
a)
Insertion- Frameshift
b)
Deletion- Substitution
c)
Deletion -Frameshift
d)
All of the above
34.
Which of the following would result in a frameshift mutation?
a)
Insertions only
b)
Substitution only
c)
Deletion only
d)
Insertions and Deletions
35.
Which of the following is an example of a harmful mutation? 
a)
Developing cancer
b)
Makes the organism faster
c)
Makes the organism a predator 
d)
Develops sharp claws
36.
What is a Gene?
a)
A segment of RNA that encodes for a protein
b)
A chromosome
c)
A segment of DNA that encodes for a protein
d)
Your genome
37.

This chart shows which amino acids are produced from different combinations of mRNA.

What is the correct sequence of amino acids produced from a segment of mRNA described by AUG CUA GUG AAA?

a)

Methionine-Leucine-Valine-Lysine

b)

Methionine-Isoleucine-Lysine-Tyrosine

c)

Methionine-Leucine-Alanine-Aspartate

d)

Methionine-Leucine-Methionine-Histidine

38.

A segment of mRNA has the base sequence UGU CAA ACU CGA. What is the base sequence of the original DNA segment?

a)

ACA GUU UGA GCU

b)

TCT GUU UGA GCU

c)

ACA GTT TGA GCT

d)

GAG TCC CTG TAC

39.

Which most accurately describes the process of protein synthesis?

a)

mRNA --> DNA --> tRNA --> protein

b)

DNA --> mRNA --> tRNA --> protein

c)

translation --> transcription --> DNA --> protein

d)

translation --> transcription --> protein --> DNA

40.

How does DNA help to form proteins?

a)

It creates proteins using nucleotides.

b)

It forms the bonds between amino acids.

c)

It creates reactants for proteins to be made.

d)

It gives instructions for the amino acid sequence.

41.

A chemical is applied to cells which prevents the formation of RNA. A disruption of this process would most likely have a direct impact on which other process within the cell?

a)

ATP production

b)

photosynthesis

c)

DNA replication

d)

protein synthesis

42.

Transcription and Translation are two important processes of protein synthesis. Read through the following descriptions. Which ones occur in Transcription?

a)

Uses DNA as a template to create mRNA

b)

Assembles amino acids into proteins

c)

Occurs in the nucleus

d)

Occurs in the ribosome which is found in the cytoplasm

e)

Occurs in the mitochrondria

43.

Transcription and Translation are two important processes of protein synthesis. Read through the following descriptions. Which ones occur in Translation?

a)

Uses DNA as a template to create mRNA

b)

Assembles amino acids into proteins

c)

Occurs in the nucleus

d)

Occurs in the ribosome which is found in the cytoplasm

e)

Occurs in the mitochrondria

44.

Which characteristic can best distinguish between two different proteins?

a)

the presence of nitrogen in the proteins

b)

the sequence of amino acids in the proteins

c)

the number of amino acids found in the proteins

d)

the location of the peptide bonds in the proteins

45.

How does tRNA deliver the appropriate amino acid?

a)

It carries multiple amino acids to the nucleus to build DNA molecules.

b)

It carries multiple amino acids to the nucleus to build the protein.

c)

Its anticodon matches with the codon on mRNA.

d)

Its anticodon matches with the codon on DNA.

46.

This diagram shows the process of translation. Which is best represented by the arrow?

a)

an amino acid chain

b)

a polysaccharide

c)

an anti-codon

d)

a codon

47.

An amoeba, a single-celled protist, is exposed to a chemical known to cause DNA mutations. A segment of DNA changes from TAC CCC CAT ACG to TAC CCC CCA TACG. What type of mutation was caused by the mutagen?

a)

base substitution

b)

insertion

c)

inversion

d)

deletion

48.

Observe the amino acid sequence below.

Before: METHIONINE – VALINE – PROLINE – LYSINE – LEUCINE

After: METHIONINE – VALINE – PROLINE – SERINE – LEUCINE

What type of mutation is shown above?

a)

deletion

b)

insertion

c)

substitution

d)

frame shift

49.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
50.

What is the purpose of Strand A?

a)

to act as a template for the synthesis of messenger RNA

b)

to carry the code from the DNA molecule in the nucleus to the ribosome

c)

picks up and transfers specific amino acids to the ribosome

d)

picks up and transfers nucleic acids to the nucleus

51.

What mRNA sequence will best match the section of DNA shown?

a)

C-T-A-G-G-C

b)

C-U-A-G-G-A

c)

A-G-C-U-U-C

d)

T-C-G-A-A-G

52.

Use the mRNA codon chart to identify Amino Acid 1 in the given picture.

a)

Isoleucine

b)

Tyrosine

c)

Methionine

d)

Serine

53.
In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). This change in skin color provides evidence that -
a)
the inheritance of skin color is an acquired characteristic.
b)
albinism is a recessive characteristic.
c)
ultraviolet light can cause mutations.
d)
the environment can influence gene action.
54.
Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?
a)
The number of adenines and cytosines determines the type of RNA that will be produced.
b)
The order of nitrogenous bases determines the order of amino acids in the proteins synthesized.
c)
The amount of thymine and guanine in the DNA molecules determines the length of the genes.
d)
The type of hydrogen bonding between the nitrogenous bases determines which amino acid will be added to the peptide chain.
55.
A model of a biological process is shown. What is the purpose of this process?
a)
To replicate the DNA of an organism before cell division
b)
To assemble nucleotides in an mRNA chain along a DNA template
c)
To synthesize amino acids used to unzip strands of DNA and copy the genetic code
d)
To translate the genetic code into a specific sequence of amino acids
56.
Which diagram demonstrates how crossing-over contributes to genetic variety during meiosis?
a)
A
b)
B
c)
C
d)
D
57.
A type of substitution in which one amino acid changes is called 
a)
Nonsense
b)
Missense
c)
Silent
d)
all of the above
58.

During translation, what does the tRNA deliver to the ribosomes?

a)

amino acids

b)

DNA

c)

mRNA

d)

proteins

59.

Two people believe they are related. Which would be the best technique to determine if they are related?

a)

testing blood types

b)

comparing DNA

c)

examining karyotypes

d)

testing for genetic disorders

60.

The process of protein synthesis consists of 2 steps. What are these steps in order?

a)

Transcription & Translation

b)

Translation & Transcription

c)

DNA Replication & Transcription

d)

DNA Replication & Translation

61.

A pedigree chart like this one is characteristic of _________________ disorders.

a)

dominant allelic

b)

autosomal recessive

c)

sex-linked dominant

d)

sex-linked recessive

62.

Sea stars (starfish) can reproduce asexually by fragmentation if their arms are cut off, or sexually by releasing sperm and eggs into the water. Which of these is the major difference between asexual and sexual reproduction in sea stars?

a)

The chromosome number is reduced in sea stars during asexual reproduction.

b)

The number of chromosomes is increased in sea stars during sexual reproduction.

c)

The appearance of the sea stars is changed as a result of asexual reproduction.

d)

There is genetic variation in the sea stars as a result of sexual reproduction.

63.

Organisms pass on their genetic information to offspring through sexual or asexual reproduction. Choose the correct pairing based on the picture.

a)

A. Sexual B. Asexual

b)

B. Sexual D. Asexual

c)

A. Asexual D. Sexual

d)

B. Asexual D. Asexual

64.

Which of these BEST describes the primary goal of meiosis?

a)

The nucleus is divided without mutation.

b)

A single cell divides into two daughter cells.

c)

All chromosomes are replicated and passed on to the daughter cells.

d)

Daughter cells are produced with only half the chromosomes of the parent cell.

65.

The characteristic indicated by the blackened figures is probably...

a)

dominant.

b)

recessive.

c)

non-dominant.

d)

sex-linked recessive.

66.

In guinea pigs, black fur is dominant. If a black guinea pig is crossed with a white guinea pig and the litter contains a white offspring, the genotype of the black-haired parent is probably?

a)

BB

b)

Bb

c)

B

d)

bb

67.

If a trait is inherited by an incomplete pattern of inheritance, the phenotype of the heterozygous individual will...

a)

only express the dominant allele and mask the recessive allele.

b)

express a blend/mix between the two other alleles.

c)

express both of the other alleles fully.

d)

only express the recessive allele and mask the dominant allele.

68.

In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red and white. The heterozygous genotype is expressed as pink. Cross a pink-flowered plant with a white-flowered plant. What is the probability of producing a pink-flowered plant?

a)

25%

b)

50%

c)

75%

d)

100%

69.

A person with type AB blood is crossed with a person with type O blood. What are the possible blood types that their offspring will have?

a)

Type A and Type B

b)

Types A, B, and AB

c)

Type AB and Type O

d)

Only Type AB

70.

_______________ are more likely to be affected by an X-linked recessive disorder because ______________________.

a)

Females; they only have one X chromosome

b)

Females; they have two X chromosomes

c)

Males; they only have one X chromosome

d)

Males; they have two X chromosomes

71.
The inheritance of short wings in Drosophila fruit flies is an x-linked, recessive trait. Which would most likely
result if a short-winged female mates with a long-winged male?
a)
All offspring will be short-winged.
b)
All females will be long-winged, and all males will be short-winged.
c)
All females will be short-winged, and all males will be long-winged.
d)
Half of the males and females will be short-winged, and half will be long-winged.
72.
A parent with Type A blood and a parent with Type O blood have a child. Which of the following is a possible genotype of their offspring?
a)
I A I A
b)
I A i
c)
I b i
d)
ii
73.
Which term is correctly matched with the description?
a)
Co-dominance occurs when two traits blend together to form a new phenotype.
b)
Human skin color is an example of codominant  trait.
c)
Incomplete dominance occurs when traits blend producing a third  phenotype.
d)
Human blood type is not an example of multiple alleles.
74.
Colorblindness is a sex-linked recessive trait. A mother with normal color-vision and a colorblind father have a
color-blind daughter. Which of the following statements is correct?
a)
All of their daughters will be colorblind
b)
The mother is a carrier of the colorblindness gene
c)
All of their sons will have normal color vision
d)
All of their sons will be colorblind.
75.
Which disease most likely occurs after excessive exposure to ultraviolet radiation?
a)
Malaria
b)
Asthma
c)
Skin Cancer 
d)
Polio
76.
This is a pedigree for a recessive genetic disorder.
What is the genotype of the person in III-2?
a)
HH
b)
Hh
c)
hh
d)
XY
77.
A couple has five children, all with
blood type A. The mother’s blood type
is O, and the father’s blood type is A.
Based on this information, which
describes the most probable genotype
of the father?
a)
diploid
b)
haploid
c)
heterozygous
d)
homozygous 
78.
In a certain fish, blue (FB) scales and red (FR) scales are codominant. When a fish has the genotype FBFR, it has a patchwork of blue and red scales. Cross two heterozygous. What are the chances of an offspring being patchwork?  
a)
1 out of 4 or 25%
b)
2 out of 4 or 50%
c)
3 out of 4 or 75%
d)
4 out of 4 or 100%
79.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
80.
Mendel's Law of ______ states that alleles separate from each other during the formation of games. 
a)
segregation 
b)
independent assortment 
c)
dominance 
d)
conservation of mass 
81.

Which correctly orders the stages of cell division?

a)

interphase, telophase, prophase, anaphase, metaphase, cytokinesis

b)

interphase, prophase, telophase, anaphase, metaphase, cytokinesis

c)

interphase, prophase, anaphase metaphase, telophase, cytokinesis

d)

interphase, prophase, metaphase, anaphase, telophase, cytokinesis

82.

Which is a difference between mitosis and meiosis?

a)

mitosis is sexual, meiosis is asexual

b)

mitosis has two divisions, meiosis has one division

c)

mitosis produces genetically diverse cells, meiosis produces identical cells

d)

mitosis produces diploid cells, meiosis produces haploid cells

83.

B = brown, b = blue


A homozygous recessive mom mates with a heterozygous father. What percentage will have the phenotype for blue eyes?

a)

50%

b)

100%

c)

25%

d)

75%

84.

What type of genetic disorder is shown?

a)

sickle cell anemia

b)

nondisjunction

c)

Huntington's disease

d)

achondroplasia (dwarfism)

85.

Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?

a)

0%

b)

25%

c)

50%

d)

75%

86.

Identical twin girls are separated at birth and cared for by two different families. After twenty years, the twins have different heights and weights. What is most likely the cause of these differences?

a)

one twin had a genetic condition that prevented her from growing tall

b)

the DNA of one twin was different from the DNA of the other twin

c)

each twin was provided a different diet and physical activities

d)

the proteins made by one twin were different than the proteins made by the other twin

87.

Which best explains why males cannot be carriers of X-linked traits?

a)

Males only have one X chromosome

b)

Males have two copies of the X chromosome

c)

Males can be heterozygous for a particular trait

d)

Males do not have an X chromosome

88.

If you cross two individuals who are heterozygous for a trait, what percentage of the offspring will also be heterozygous?

a)

0%

b)

25%

c)

50%

d)

100%

89.

A family tree showing the inheritance of a particular trait over generations is known as a?

a)

phylogenetic tree

b)

karyotype

c)

pedigree

d)

Punnett square

90.

A mutation in which types of cells would only affect the organism and not future generations?

a)

Egg cell and liver cell

b)

Sperm cell and egg cell

c)

Nerve cell and brain cell

d)

Sperm cell and lung cell

91.

Which part of a DNA molecule is responsible for the direct coding of specific traits in an organism?

a)

The number of hydrogen bonds that hold the strands of DNA together.

b)

The number of carbons in the DNA molecule.

c)

The sequence of nucleotide bases in the DNA molecule.

d)

The sequences of phosphates along each DNA strand.

92.

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.

93.

A certain mutation in the gene for hemoglobin results in the red blood cells becoming sticky, rigid, and irregularly shaped. These irregularly shaped red blood cells block the flow of blood throughout the body. A single base mutation is responsible for these irregularly shaped blood cells.

Which of these mutations most likely results in the mutated hemoglobin gene?

a)

Insertion

b)

Deletion

c)

Duplication

d)

Substitution

94.

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientists can add, remove, or modify sections of the DNA sequence.

How can scientists use this technique to control gene expression?

a)

By activating or deactivating specific genes

b)

By calculating the number of genes different organisms produce

c)

By identifying how closely related one individual is to another

d)

By determining the number of chromosomes in an organism

95.

The model shows a mutation to a partial sequence of bases in a gene.

Which type of mutation does the model demonstrate?

a)

Deletion

b)

Insertion

c)

Substitution

d)

Translocation

96.

Which effect could a mutation in mRNA have on the production of proteins?

a)

The protein produced will have a different identity.

b)

The protein produced will have a coiled shape.

c)

The protein produced will produce excess nitrogen.

d)

The protein produced will produce excess water.

97.

Which numbered component represents nitrogen bases? _____

a)

1

b)

2

c)

3

d)

4

98.

The genetic code is carried by what part of the DNA?

a)

A hydrogen bonds

b)

5-carbon sugars

c)

phosphate groups

d)

nitrogen bases

99.

Genes from a sea coral can be transferred into a zebra fish to make it glow in response to ultraviolet light.  The fact that genes from one species can be placed into another is evidence that all organisms –

a)

produce the same collection of proteins

b)

contain a membrane-bound nuclei   

c)

share a common genetic code

d)

have genetically identical genomes

100.

The different versions of a trait are called ___________

a)

Genes

b)

Chromosomes

c)

Alleles

d)

DNAs

101.

A _________ is DNA tightly coiled around proteins.

a)

gene

b)

chromosome

c)

trait

d)

mutation

102.

The diagram shows homologous chromosomes during prophase I of meiosis. Which of the following correctly describes the process being illustrated?

a)

Segregation of sister chromatids

b)

Mutation in which the DNA content of the gene is altered

c)

Crossing over in which alleles are exchanged

d)

Condensation and segregation of alleles

103.
Body cells have diploid or haploid number of chromosomes?
a)
Haploid
b)
Diploid
104.
The allele combinations
a)
genetics
b)
mitosis
c)
genotype
d)
phenotype
105.
Which of the following best describes meiosis?
a)
It is carried out in all tissues theat require cell replacement
b)
It occurs only in cells in the reproductive structures of an organism
c)
It happens in all of the tissues except the brain and spinal cord
d)
It is the first stage of mitosis
106.
Which is the correct order?
a)
C,D, B, A, F, E
b)
D,A,F,C,E,B
c)
B,E,C,F,A,D
d)
C,B,D,A E,F
107.
In meiosis, crossing over occurs in prophase 1. What is the significance of this event?
a)
This process ensures that chromosomes are evenly divided into daughter cells.
b)
This process can lead to genetic variation in daughter cells.
c)
This process can create gaps in the chromosome DNA for RNA to bind.
d)
This process allows for spindles to connect to the chromosomes in order to pull chromosomes apart.
108.
This image shows which phase?
a)
Prophase
b)
Interphase
c)
Anaphase
d)
Telophase
109.
The end of meiosis results in  ________ to each other.
a)
2 cells that are identical
b)
4 cells that are identical
c)
2 cells that are not identical
d)
4 cells that are not identical
110.
function of mitosis
a)
genetic diversity though sexual reproduction
b)
cell reproduction and general growth and repair
111.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
112.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the probability of having a white flowered plant if the parents were heterozygous red and homozygous red?
a)
0%
b)
25%
c)
50%
d)
100%
113.
When does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
Mitosis
114.

In some cat breeds, short hair (H) is dominant to long hair (h). A homozygous male cat with short hair and a long-haired female cat produce offspring. Which percentage of the offspring is predicted to have short hair?

a)

25%

b)

50%

c)

75%

d)

100%

115.

The table below lists human blood group genotypes and phenotypes.


Why is the AB phenotype a result of codominance?

a)

Neither allele is expressed in the phenotype.

b)

Both alleles are equally expressed in the phenotype.

c)

One allele masks the expression of the other during expression of the phenotype.

d)

Both alleles blend together to form an intermediate phenotype during expression.

116.

Coat color in cats is inherited by X-linked genes, with alleles for black and orange-brown. The alleles and phenotypes are as given below.


A cross between an orange-brown male and a homozygous black female produce four kittens. What is the phenotypic probability of the offspring?

a)

50% black female and 50% black male

b)

50% calico female and 50% black male

c)

50% orange-brown female and 50% black male

d)

50% calico female and 50% orange-brown male

117.

In human genetics, brown eyes (B) are dominant over blue eyes (b). A brown-eyed man is heterogeneous (Bb). He marries a blue-eyed woman. What is the probability of their child having blue eyes?

a)

100%

b)

75%

c)

50%

d)

25%

118.

A female is homozygous for a recessive trait (rr), while the male is homozygous dominant for the same trait (RR). What percentage of their offspring would be expected to exhibit the dominant trait?

a)

0 percent

b)

25 percent

c)

50 percent

d)

100 percent

119.

In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?

a)

25%

b)

50%

c)

75%

d)

100%

120.

In sheep, producing white wool (W) is dominant to black wool (w), and having brown eyes (E) is dominant to blue eyes (e). A cross of two heterozygous sheep is shown in the Punnett square below


Which of the following describes an outcome of this cross?

a)

1/16 will have white wool and brown eyes

b)

3/16 will have black wool and brown eyes

c)

4/16 will have white wool and blue eyes

d)

9/16 will have black wool and blue eyes

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