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Heredity Revision Quiz

Total questions: 60

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

Alternative forms of a gene are called

a)

Alleles

b)

Homozygous

c)

DNA

d)

Genetics

2.
This trait will always be expressed if present because it will mask the expression of others
a)
stem cells
b)
heterozygous
c)
dominant
d)
recessive
3.
Hair colour is an example of
a)
genotype
b)
phenotype
4.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
5.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
6.
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
7.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
8.
The diploid number of human chromosomes is
a)
23
b)
46
c)
92
9.
Each identical side of a chromosome is the 
a)
centromere
b)
chromatin
c)
centriole
d)
chromatid
10.
The union of egg and sperm to form a new offspring is
a)
zygote
b)
fertilization
c)
homologous pairing
d)
meiosis
11.
A man with brown eyes reproduces with a woman that also has brown eyes.  What are the possible genotypes for their child?
a)
BB, Bb, bb
b)
BB, bb, Be
c)
Bb, bb, BE
d)
BE, Be, bb
12.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
13.
What is a recessive allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
14.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
15.
Looking at the punnett square and B is brown eyes and b is blue eyes.  What chance is there that the offspring will have brown eyes?
a)
25%
b)
50%
c)
75%
d)
100%
16.

How many males are color-blind in this family?

a)

2

b)

3

c)

4

d)

5

17.

What must the genotype of individual II-3 be?

a)

HH

b)

Hh

c)

hh

d)

None of the above

18.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
19.
Mutations are a change in what?
a)
DNA
b)
tRNA
c)
genotype
d)
phenotype
20.
An organism gets to choose if the mutation is helpful, harmful or neutral.
a)
True
b)
False
21.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
22.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
23.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
24.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
25.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
26.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

a)

HH

b)

Hh

c)

hh

27.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
28.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia. 
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY 
29.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
30.
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%
31.
What is the chromosomal condition of the individual whose karyotype is seen in the image?
a)
Turner's Syndrome
b)
Trisomy 21 (Down Syndrome)
c)
Trisomy 13
d)
Trisomy 18
32.
A human being can have one of four blood types: A, B, AB, and O. The type A allele and the type B alleles are codominant to each other and dominant over the type O allele. 
Suppose that two people, both heterozygous for type A blood, marry and have a child. What is the probability that the child will have type A blood? 
a)
25%
b)
50%
c)
75%
d)
100%
33.

Which of the following is the female animal gamete?

a)

Sperm

b)

Egg

c)

Pollen

d)

Teste

34.
Unlike mitosis, meiosis in male mammals results in the formation of
a)
one haploid gamete
b)
three diploid gametes
c)
four diploid gametes
d)
four haploid gametes
35.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
36.

A zygote is formed by ___________ of a male and female gamete.

a)

fertilization

b)

division

c)

reduction

d)

addition

37.

What type of asexual reproduction does the figure represent?

a)

Binary Fission

b)

Budding

c)

Vegetative Propagation

d)

Fragmentation

38.

What type of asexual reproduction does the figure represent?

a)

Binary Fission

b)

Budding

c)

Vegetative Propagation

d)

Fragmentation

39.
Which organ produces eggs?
a)
A
b)
B
c)
C
d)
D
40.
Where does fertilisation take place?
a)
Ovary
b)
Womb
c)
Vagina
d)
Fallopian tube
41.
Choose the nucleotide sequence of the RNA strand that would be complementary to the following strand: 
GTAGTCA
a)
UATUAGA
b)
ACGACTG
c)
CAUCAGU
d)
CATCAGT
42.
The main function of tRNA is to...
a)
carry a message that, when translated, forms proteins
b)
form a portion of ribosomes
c)
string together complementary RNA and DNA strands
d)
bring amino acids from the cytoplasm to the ribosomes
43.
Which of the following events occurs directly after RNA polymerase recognizes a gene?
a)
The polymerase strings amino acids into a polypeptide
b)
Free-floating nucleotides pair up with exposed DNA bases
c)
A complementary RNA strand detaches itself from the DNA
d)
The DNA strand begins to unwind, separating the two strands
44.
What is the term for a three-nucleotide sequence that codes for an amino acid?
a)
base
b)
codon
c)
amine
d)
serine
45.
Which phrase best describes translation?
a)
converts mRNA into a polypeptide
b)
catalyzes bonds between amino acids
c)
produces RNA from DNA molecules
d)
recycles tRNA molecules for reuse
46.
Which of the following is the site of transcription?
a)
vacuole
b)
lysosome
c)
nucleus
d)
ribosome
47.
Which of the following is the site of translation?
a)
vacuole
b)
lysosome
c)
nucleus
d)
ribosome
48.

The monomers units of DNA and RNA are

a)

amino acids

b)

monosaccharides

c)

nucleotides

d)

fatty acids

49.

Which of the following sequences best describes the flow of information that takes place when a gene directs the synthesis of a cellular component?

a)

RNA-DNA-RNA-PROTEIN

b)

DNA-RNA-PROTEIN

c)

PROTEIN-RNA-DNA

d)

DNA-AMINO ACID-RNA-PROTEIN

50.

The info carried by DNA is in

a)

an amino acid sequence

b)

the sugars and phosphates that form the backbone

c)

the order of bases in the molecule

d)

the total number of nucleotides

51.

During the process of translation, ____ matches a nucleic acid codon with the proper amino acid.

a)

a ribosome

b)

ATP

c)

polymerase

d)

mRNA

52.

A mutagen is

a)

a gene that has an altered mutation

b)

something that causes a mutation

c)

any change in a nucleotide sequence of DNA

d)

the portion of the chromosome altered by the mutation

53.

Any change in the nucleotide sequence of a gene is called

a)

a mutation

b)

a codon

c)

a translation

d)

an anticodon

54.

When an organism is genetically engineered, what occurs?

a)

the genome is identical to their parents'

b)

they are made using half the genomes of two different species

c)

the organism contains genes that were transferred from another organism

d)

they are produced by breeding only the individuals with desired traits.

55.

A biologist needs to know which of three male zebras fathered the litter. Which process can solve this problem.

a)

organism cloning

b)

genome sequencing

c)

gene therapy

d)

DNA fingerprinting

56.

What is a plasmid?

a)

a section of the human genome

b)

a material that cuts DNA

c)

viral DNA

d)

an accessory piece of DNA found in bacteria

57.

Why is DNA polymerase needed in the PCR process?

a)

they are the building blocks to make more DNA

b)

it is used as a template to make more DNA

c)

it attaches to either end of the gene to be copied

d)

it is what makes a complementary copy of the template DNA strand

58.

Why is the first heating up stage needed in the PCR cycle?

a)

it allows the primers to attach the DNA

b)

it allows the DNA polymerase to attach to the DNA to begin copying it

c)

it attaches the nucleotides to make DNA

d)

it unwinds the double stranded DNA so both strands can be used as a template to make more DNA

59.

This laboratory procedure is known as

a)

CLONING

b)

gel electrophoresis

c)

chromatography

d)

use of a dichotomous key

60.

Involves inserting DNA of one organism into the DNA of another organism using gene splicing.

a)

Selective breeding

b)

Hybridization

c)

Recombinant DNA

d)

PCR