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Genetics Test Review

Total questions: 50

Worksheet time: 1hrs 28mins

Name
Class
Date
1.

If a father's blood genotype is AA and the mother is AB genotype, what is the probability for they have a child with AB blood type?

a)

0%

b)

25%

c)

50%

d)

75%

2.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
3.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
4.

What is the mode of inheritance for this pedigree?

a)

sex-linked dominant

b)

autosomal dominant

c)

autosomal recessive

d)

sex-linked recessive

5.

A cross between a white-coated cattle (RR) and red-coated cattle (rr) produce spotted offspring (Rr). This type of inheritance pattern is known as:

a)

dominance

b)

codominance

c)

incomplete dominance

d)

sex-linkage

6.

In dogs, wire hair (D) is dominant over smooth hair (d). If two wire-haired dogs produce a smooth-haired pup, the genotypes of the parent dogs are most likely:

a)

DD and Dd

b)

DD and DD

c)

Dd and Dd

d)

Dd and dd

7.
A boy inherits genes for tallness, but his growth is limited as a result of poor nutrition. This is an example of - 
a)
environmental influence on gene expression 
b)
expression of a hidden trait
c)
an inherited disorder
8.

A mutation can be passed to offspring only if it takes place in this kind of cell

a)

skin cell

b)

gamete cell

c)

somatic cell

d)

blood cell

9.
Which of the following describe a clone?
a)
The DNA of the clone is identical to the DNA of the parent
b)
Clones can happen naturally
c)
Clones can be made in labs
d)
All of the answers are correct
10.

What would you call the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during meiosis?

a)

nondisjunction

b)

anaphase I

c)

nondiploidy

d)

karyotype

11.
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
12.

What type of inheritance is exhibited when two alleles combine and create a blended phenotype?

a)

Incomplete Dominance

b)

Codominance

c)

Mendelian Inheritance

d)

Homozygous Inheritance

13.
Which male is the father of this child?
a)
Male 1
b)
Male 2
c)
Neither could be the father
d)
Either could be the father
14.
A farmer has bred his pineapple plants from the sweetest pineapples from his last harvest to get even sweeter pineapple plants. What is this an example of?
a)
Selective breeding
b)
Natural selection
c)
Extinction
d)
Mutagenesis
15.

What is the genotypic ratio from this cross?

a)

1 TT : 2Tt : 1 tt

b)

4 Tall : 0

c)

3 TT : 1 tt

d)

4 TT : 0

16.
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
17.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
18.
Which of Mendel's laws states that alleles are separated during meiosis?
a)
Law of Dominance
b)
Law of Segregation
c)
Law of Independent Assortment
d)
Law of Meiosis
19.
Genotype refers to
a)
the physical expression of the genes
b)
the combination of alleles for a trait
c)
whether an allele is dominant or recessive
d)
how an organism will appear
20.

A male beetle has the genotype TtBb and a female beetle has the genotype TtBb. What would be phenotypic ratio seen in the offspring of these two beetles?

a)

1:2:1:1

b)

9:3:3:1

c)

1:1:1:1

d)

4:4:4:4

21.
DNA is recovered from a suspected dead soldier.  Which Parents are the likely parents of the soldier?
a)
Parents C and D
b)
Parents E and F
c)
Parents A and B
d)
Parents G and H
22.

What gamete possibilities could come from this parent's genotype?

a)

AB and aB

b)

Ab, AB and ab

c)

Ab only

d)

AB, aB, ab and aB

23.
What pattern of inheritance does this pedigree show?
a)
sex-linked recessive
b)
autosomal dominant
c)
autosomal recessive
d)
cannot be determined
24.
Why does individual IV-7 have color-blindness?
a)
Because her mom is a carrier.
b)
Because her dad has it.
c)
Because her siblings have it.
d)
Because her uncle has it.
25.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of female offspring will have red eyes?
a)
0%
b)
25%
c)
50%
d)
100%
26.
Which genetic abnormality is shown in this karyotype?
a)
Partial Addition
b)
Partial Deletion
c)
Trisomy
d)
Monosomy
27.
Making changes in the DNA of an organism is
a)
selective breeding
b)
artificial selection
c)
genetic engineering
d)
genetic transformation
28.

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different?

a)

The two different cells become mutated

b)

The genes expressed in each cell are different

c)

They actually have different DNA in the two types of cells.

d)

The genome of the different cells changes

29.
Which of the following are true of asexual reproduction? 
a)
Produces clones
b)
Requires one parent only
c)
Used by bacteria
d)
All of the above
30.
What information can you detect from this karyotype?
a)
It's a female
b)
It's a male
31.
What are the possible genotypes for the 3 offspring? The parents are HH and hh.
a)
100% Hh
b)
50% HH, 50% hh
c)
25% HH, 50% Hh, 25% hh
d)
100% HH
32.

Why can genetically identical twins begin to look different as they age?

a)

they look identical but their DNA has always been different

b)

Mutations accumulate which deactivates histone proteins.

c)

The environment, diet and exposure to toxins can influence the expression of genes.

d)

The DMNT gene is silenced.

33.
Would a mutation in the DNA of a skin cell be passed on to an organism's offspring?
a)
Yes, because any change to the DNA is passed on to the offspring
b)
Maybe. Sex cells only use half of the body's genetic code. It might get the copy of a gene that wasn't mutated.
c)
No. Only mutations that occur in the gametes (sex cells) are passed on to the offspring
d)
Without knowing the animal, it would be hard to tell whether or not the mutation would be passed on.
34.
Bob was found dead in his home.  Crime scene analysis showed signs of a struggle.  Blood was collected from the crime scene, the victim, and three suspects.  Which suspect likely committed the crime? 
a)
Sue
b)
Lisa
c)
John
d)
None of these
35.
Which two bear species are most closely related?
a)
Bear 1 and Bear 2
b)
Bear 1 and Bear 3
c)
Bear 2 and Bear 3
d)
There’s no way to tell
36.

What is the mode of inheritance shown here?

a)

Autosomal Recessive

b)

Sex Linked Recessive

c)

Autosomal Dominant

37.

If a chicken farmer wanted to increase hens that produce more eggs, he would

a)

feed the hens more

b)

give hens more antibiotics

c)

breed hens that produce more eggs than other hens

d)

keep the rooster away

38.
Two organisms that are closely related would have
a)
very similar DNA sequence
b)
exactly the same DNA sequences
c)
no proteins in common
d)
completely different DNA sequence
39.

The word root anti- means-

4 lines
40.

The word root auto means-

4 lines
41.

The word root chloro means-

4 lines
42.

The word root chromo means-

4 lines
43.

The word root path means-

4 lines
44.

The word root phage means-

4 lines
45.

The word root photo means-

4 lines
46.

The word root sub means-

4 lines
47.

The word root troph means-

4 lines
48.

The word root vore means-

4 lines
49.

What is recombinant DNA?

a)

DNA from 2 different organisms combined

b)

DNA from 2 different ribosomes

c)

DNA that is separated out from a vector

50.

How is it possible to combine bacterial DNA with human DNA?

a)

Humans have the same exact DNA sequence as bacteria

b)

Both humans and bacteria share the same components of DNA.

c)

Humans have bacteria inside of them.

d)

Humans and bacteria are both eukaryotic organisms.

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