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Genetics Review

Total questions: 70

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
What is the relationship between DNA and chromosomes?
a)
Chromosomes are made of DNA
b)
DNA is made of chromosomes
c)
DNA and chromosomes are the same thing.
d)
All of the above are correct
2.
Why are your chromosomes arranged in pairs?
a)
Scientists have no idea
b)
Because you get one from your mom and one from your dad
c)
Because pairs can divide easier
d)
Because DNA is awesome
3.
Which statement is true?
a)
Your DNA is the same as your siblings.
b)
Your set of DNA is identical to your mothers.
c)
Your set of DNA is identical to your fathers.
d)
Your DNA is unique to you.
4.
Besides genetics, what other factors are responsible for how you will grow and develop?
a)
How people treat you
b)
How hard you study
c)
Nutrition and environment
d)
What your parents look like
5.
Which trait is completely determined by your DNA?
a)
Your personality
b)
Your intelligence
c)
Your natural hair color
d)
Your weight
6.
Put in order smallest to largest:
a)
Chromosome - DNA - Gene
b)
Gene - DNA - Chromosome 
c)
DNA - Gene  Chromosome
d)
Chromosome - Gene  - DNA
7.
Which is true about DNA?
a)
Only animals have DNA in their cells
b)
DNA research is simple and quick
c)
DNA contains many genes
d)
None of the above are true.
8.
Inherited traits are controlled by 
a)
genetic information in the genes
b)
the environment a baby is born into
c)
the nucleus and mitochondria
d)
none of the above
9.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
10.
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
11.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
12.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
13.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
14.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
15.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
16.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
17.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
18.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
19.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
20.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
21.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
22.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
23.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
24.

Genetics is the study of...

a)

Body systems

b)

cell division

c)

heredity

d)

sexual reproduction

25.

The variance in a gene, which occur on a fixed spot on a chromosome is a called an

a)

Allele

b)

Cell

c)

Centromere

d)

Nucleus

26.

On a punnett square, two capital letters indicate a gene which is

a)

Homozygous dominant

b)

Homozygous recessive

c)

Heterozygous

d)

None of the above.

27.

On a punnett square, two lowercase letters indicate a gene which is

a)

Homozygous dominant

b)

Homozygous recessive

c)

Heterozygous

d)

None of these

28.

What genotype are the father and mother?

a)

Homozygous Dominant

b)

Homozygous Recessive

c)

Heterozygous

29.

What is the probability the offspring will be homozygous dominant?

a)

25%

b)

50%

c)

75%

d)

100%

30.

What is the probability that the offspring will be heterozygous?

a)

25%

b)

50%

c)

75%

d)

100%

31.

What is the probability that the offspring will be homozygous recessive?

a)

25%

b)

50%

c)

75%

d)

100%

32.

What is the probability that the offspring will express the dominant trait?

a)

25%

b)

50%

c)

75%

d)

100%

33.

What is the probability that the recessive trait will be expressed by the offspring?

a)

25%

b)

50%

c)

75%

d)

100%

34.

A mutation is harmful to an organism if it

a)

changes the phenotype of an organism

b)

changes the DNA segment

c)

reduces the organism's chance of survival

d)

makes the organism better able to avoid predators

35.

Who studied different characteristics of pea plants by cross-pollinating plants?

a)

Gregor Mendel

b)

Albert Punnett

c)

Sir Isaac Newton

d)

David Kuster

36.

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

a)

25%

b)

50%

c)

75%

d)

100%

37.

What does a Punnett Square determine?

a)

all of Mendel's discoveries about genetic crosses

b)

all the outcomes of a genetic cross

c)

only the recessive allele combinations

d)

only the dominant allele combinations

38.

Factors that control traits are

a)

purebreds

b)

genes

c)

recessives

d)

parents

39.

Scientists call an organism with two different alleles for a trait

a)

factor

b)

purebred

c)

trait

d)

hybrid

40.

A mutation is

a)

any change that is harmful

b)

any change in a gene or chromosome

c)

any change that is helpful

d)

any change in the phenotype

41.

An organisms's allele combination is known as

a)

phenotype

b)

mutation

c)

hybrid

d)

genotype

42.

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

a)

100%

b)

0%

c)

75%

d)

25%

43.

What does RR mean

a)

two dominant alleles

b)

heterozygous alleles

c)

at least one dominant allele

d)

one dominant and one recessive allele

44.

A mutation that is missing a nitrogen base is

a)

deletion

b)

substitution

c)

addition

d)

mixing

45.

A mother gives birth to a son, she then gives birth to a daughter. What is the likely hood that she will have another son?

a)

75%

b)

25%

c)

50%

d)

100%

46.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
47.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
48.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
49.
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
50.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
51.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
52.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
53.
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
54.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
55.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
56.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
57.
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
58.
A GMO is
a)
A mutant animal
b)
An organism that is made up of lots of different organisms
c)
a genetically mutated option of the human genome
d)
an organism whose DNA has been purposely altered by human intervention
59.

The base of a DNA molecule is a

a)

nucleotide

b)

nucleus

c)

nucleic acid

d)

nitrogen base

60.

A pair of nitrogen bases that make up the entire genome is

a)

cytosine and guanine

b)

adenine and thymine

c)

cytosine and adenine

d)

thymine and guanine

61.

What base pairs with adenine?

a)

phosphate

b)

guanine

c)

cytosine

d)

thymine

62.

What base pairs with thymine?

a)

adenine

b)

guanine

c)

cytosine

d)

limousine

63.

What are the 3 parts of a nucleotide?

a)

a phosphate group

b)

a base

c)

a wave caused by a large bomb

d)

a 5 carbon sugar

64.

Why is DNA important?

a)

It teleports cookies to my locker.

b)

It carries the instructions for our cells.

c)

It allows me to be invisible.

d)

It gave us a snow day in August.

65.

If a DNA sequence is CATCAT, what are the matching base pairs?

a)

ACGTAC

b)

MEOW

c)

GTAGTA

d)

GCCTAT

66.

What does the structure of DNA resemble?

a)

an airplane propeller

b)

a twisted ladder

c)

a twisted Christmas tree

d)

a hippo in a tutu

67.
Which of the following units are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
68.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
69.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
70.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil

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