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Genetics Review

Total questions: 48

Worksheet time: 58mins

Name
Class
Date
1.
Notice the abnormal 23rd chromosome.  This individual suffers from which chromosomal genetic disorder?
a)
Klienfelter's Syndrome
b)
Down Syndrome
c)
Cris-du-Chat Syndrome
d)
Andrew's Syndrome
2.
A chromosome is found to be shorter than it's homologous match.  Which type of mutation would this most likely be?
a)
insertion
b)
deletion
c)
translocation
d)
inversion
3.

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.

4.

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

a)

The two different cells become mutated

b)

The proteins 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

5.
The different forms of a gene are called 
a)
traits
b)
chromosomes
c)
alleles
d)
peas
6.

RR- round

rr-wrinkled

What is the phenotype for Rr?

a)

wrinkled

b)

round

7.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
8.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
9.

Genes for medically important proteins can be cloned and inserted into bacteria. Why can bacteria recognize a human gene and then produce a human protein?

a)

DNA replication in bacteria and humans is the same.

b)

Bacterial cells contain the same organelles as human cells.

c)

The basic components of DNA are the same in humans and bacteria.

d)

Bacterial cells and human cells contain the same kind of chromosomes.

10.

A dominant trait is

a)

a trait that shows in a person's phenotype when present.

b)

the capital letter in a punnet square

c)

All of the Above

11.

Chromosomes are divided into segments called

a)

chromosomes

b)

genes

c)

cell differentiation

12.
_______ is a segment of DNA that codes for a specific product (protein)
a)
Phosphate
b)
Sugar
c)
Gene
d)
Bond
13.
All cells within an organism contain the _____ DNA sequence
a)
different
b)
same
14.
Which macromolecule contains the information to make macromolecules that give people their characteristics?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
15.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics
16.
The physical appearance of an organism based on traits
a)
Genotype
b)
Phenotype
c)
Meiosis
d)
Genetics
17.
The allele combinations
a)
genetics
b)
mitosis
c)
genotype
d)
phenotype
18.
Hair colour is an example of
a)
genotype
b)
phenotype
19.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
20.

Which of the following is a genotype?

a)

Bb

b)

Black fur

21.
The cells produced via meiosis are called:
a)
sex cells
b)
somatic cells
c)
body cells
d)
skin cells
22.
If the Diploid number of Carrots is 18, the haploid number is
a)
18
b)
9
c)
27
d)
36
23.
If a body cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
a)
3
b)
6
c)
12
d)
24
24.
Name the growth phase of the cell cycle for both Mitosis and Meiosis.
a)
metaphase
b)
telophase
c)
interphase
d)
anaophase
25.
products of meiosis are genetically
a)
different
b)
identical
26.
Human eggs and sperm are _____, and each has ____ chromosomes.
a)
diploid, 23
b)
diploid, 46
c)
haploid, 23
d)
haploid, 46
27.
The process of crossing over occurs in what phase of meiosis?
a)
anaphase 1
b)
prophase 1
c)
prophase 2
d)
telophase 1
28.

The chromosomes that pair up during meiosis, are called __________ chromosomes.

a)

heterozygous

b)

asexual

c)

homologous pairs

d)

genes

29.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
30.
What process, and which type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
31.
If this image were real, it would represent what type of inheritance?
a)
incomplete dominance
b)
codominance
c)
polygenic inheritance
d)
compete dominance
32.
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%
33.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
34.
In a Punnett square each box represents a(n)....
a)
offspring
b)
parent
c)
gene
d)
trait
35.
What type of inheritance is shown?
a)
complete
b)
incomplete
c)
codominance
d)
sex-linked
36.
What do you call the non-Mendelian inheritance pattern that states that neither trait is dominant and the traits appear to blend together?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
37.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
38.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
39.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
40.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
41.
Long tongues (T) are dominant to short tongues in green tree frogs.  What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?
a)
100%
b)
75%
c)
50%
d)
25%
42.
In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
43.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
44.
In flowers, purple color is dominant to pink and short is dominant to tall. Cross a flower that is heterozygous for both traits with another flower that is pink and tall. What is the percentage of the flowers being pink and short?
a)
75%
b)
25%
c)
4
d)
1/2
45.
parent 1: GgBB
parent 2: ggBb
Find the gametes for parent 1.
a)
GB, GB, gB, gB
b)
gB, gb, gB, gb
c)
Gg, BB, GB, GB
d)
gg, Bb, gB, gb
46.
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
47.

In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair

color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having

horns (p).


What is the expected phenotypic ratio of the offspring of a BbPp × BbPp cross if these alleles

sort independently?

a)

16 black/polled : 0 black/horned : 0 red/polled : 0 red/horned

b)

12 black/polled : 0 black/horned : 0 red/polled : 4 red/horned

c)

4 black/polled : 4 black/horned : 4 red/polled : 4 red/horned

d)

9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned

48.

Facial dimples and free earlobes are both considered dominant human traits. What are the

expected phenotypes of the offspring of a female with dimples and free earlobes (DDFf) and a

male with no dimples and attached earlobes (ddff)?

a)

50% with dimples and free earlobes and 50% with dimples and attached earlobes

b)

50% with dimples and free earlobes and 50% with no dimples and attached earlobes

c)

75% with dimples and free earlobes and 25% with no dimples and attached earlobes

d)

75% with dimples and attached earlobes and 25% with no dimples and free earlobes

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