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Genetics

Total questions: 48

Worksheet time: 24mins

Name
Class
Date
1.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
2.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
3.
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
4.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
5.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
6.

Which of the following is the best definition for heredity?

a)

Heredity is the passing of particles from high concentration to low concentration.

b)

Heredity explains how DNA copies itself.

c)

Heredity is the passing of traits from parent to offspring.

d)

Heredity is the forming of clones.

7.

This scientist studied pea plants and was considered to be the "Father of Genetics".

a)

Reginald Punnett

b)

Gregor Mendel

c)

Charles Darwin

d)

Rosalind Franklin

8.

According to this punnett square shown, the recessive trait is:

a)

Wrinkled peas

b)

Green pods

c)

Yellow pods

d)

Purple seeds

9.

Segments of DNA that code for specific traits are referred to as:

a)

RNA

b)

genes

c)

DNA splicing

d)

Chromosome

10.

Which of the following shows a genotype that would be considered homozygous? Choose all that apply.

a)

GG

b)

gg

c)

Gg

d)

Bb

e)

bb

11.

An allele is:

a)

different genes that code for different characteristics.

b)

different chromosomes.

c)

a different form of the same gene.

d)

section of the nucleus that forms chromosomes.

12.

A human body cell contains:

a)

46 chromosomes

b)

23 chromosomes

c)

21 chromosomes

d)

40 chromosomes

13.

A human sex cell contains:

a)

46 chromosomes

b)

23 chromosomes

c)

46 pair chromosomes

d)

20 chromosomes

14.

Which of the following is true regarding genes and chromosomes?

a)

Genes and chromosomes do not have any connection.

b)

Chromosomes make up genes.

c)

Chromosomes are made up of genes which are located in the cytoplasm of the cell.

d)

Genes are sections of the DNA strand and are located on chromosomes.

15.

Term for an organism that display two separate phenotypes at the same time

a)

codominance

b)

incomplete dominance

c)

multiple alleles

d)

linked genes

16.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
17.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
18.
The different forms of genes are known as
a)
environment
b)
probability
c)
traits
d)
alleles
19.

Which is a true statement about this picture?

a)

Brown is recessive

b)

Brown is dominant

c)

Blue is dominant

d)

Blue is codominant

20.
What are the possible phenotypes in this punnett square?
a)
Bb, bb, BB
b)
purple, white
c)
Bb, bb
d)
light purple
21.

How is it possible for an offspring show a trait that is NOT displayed in either of its parents?

a)

When both parents are homozygous recessive and showing the recessive trait, their offspring will get the dominant gene. This will allow the offspring to show the dominant trait.

b)

The genes have been modified from parent to offspring

c)

When both parents are heterozygous and showing the dominant trait, it is possible for both parents to pass on the recessive gene to their offspring. This will allow the offspring to show the recessive trait.

22.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 
a)
50 % Brown Hair and 50% Blond Hair 
b)
25 % Brown Hair and 75% Blond Hair 
c)
75 % Brown Hair and 25% Blond Hair 
d)
0% Brown Hair and 100% Blond Hair 
23.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
24.
A plant shows incomplete dominance in size. A tall plant (TT) is crossed with a medium plant (TS). What fraction of plants will also be tall?
a)
100 %
b)
75%
c)
50%
d)
25%
25.
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%
26.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
27.

A brown rooster and a white chicken produced this speckled offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

28.

A black male and white female produced this grey offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

29.

A long-haired female rabbit and a short-haired male rabbit produced this offspring with a medium-length coat:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

30.

A pink flower and a white flower produced this offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

31.

A man with blue eyes and a woman with brown eyes produced a child with brown eyes:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

32.

A woman with curly hair and a man with straight hair produced a child with wavy hair:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

33.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?

a)

male with white eyes

b)

female with red eyes

c)

male with red eyes

d)

female with white eyes

34.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?

a)

male with white eyes

b)

female with white eyes

c)

male with red eyes

d)

female with red eyes

35.

What are the genotypes of these flies:


white eyed, male ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

XR Y

36.

What are the genotypes of these flies:


white eyed, female ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

37.

Look at this cross: XB XB x Xb Y

What proportion/percent of the male children are colorblind?

a)

100%

b)

75%

c)

25%

d)

0%

38.

H= normal blood clotting

h=hemophilia


XHXh x XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

39.
Jim has type AB blood. His dad could be type O.
a)
True
b)
False
40.
What types of blood can a person with AB RECEIVE?
a)
B only
b)
AB, A, B, O
c)
AB and O only
d)
A only
41.

If one of your parents is blood type A and the other is type B, which of the following blood types could you be?

a)

O

b)

AB

c)

A or B

d)

Any

42.
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
a)
100 %
b)
75%
c)
50%
d)
25%
43.
If a red blood cell has no antigens on its surface, what is its blood type?
a)
A
b)
B
c)
AB
d)
O
44.

What are traits?

a)

A characteristic that an organism can pass on to its offspring through its genes

b)

Scientific study of heredity

c)

When sperm and eggs join producing

d)

Many generations that have the same trait

e)

Physical characteristics from the parents offspring

45.

Tusk length in elephants is inherited through complete dominance. A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

46.

Unicorn horns are inherited through complete dominance. What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

47.
Jabba the Hutt has finally decided to settle down and have a family. He has undergone genetic testing and learned that he is heterozygous for Hutt Fungal Syndrome, which is caused by recessive alleles. He is worried that his children might suffer from this syndrome. His Hutt mate has undergone genetic testing and discovered she is homozygous dominant for the syndrome. Should Jabba be worried?
a)
Yes
b)
No
48.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4

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