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Genetics Quiz (with DNA) in class

Total questions: 36

Worksheet time: 27mins

Name
Class
Date
1.

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

2.

The process of DNA replication is called semi conservative because it results in

a)

none of these

b)

Two DNA molecules.  One original molecule and one with two new strands

c)

two exact copies with new strands

d)

two DNA molecules, each with 1 original strand and one new.

3.

Why does DNA replicate?

a)

To create a duplicate copy in case the original gets damaged

b)

New cells will have a copy of the DNA

c)

To create a new copy to replace the damaged original

4.

Nitrogen bases are joined by which type of bond?

a)

polar bonds

b)

hydrogen bonds

c)

phosphate bonds

d)

deoxyribose bonds

5.

Adenine bonds with _____

a)

Cytosine

b)

Thymine

c)

Guanine

d)

Uracil

6.

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

7.

Cytosine bonds with ____

a)

Adenine

b)

Thymine

c)

Guanine

d)

Uracil

8.

What is a mutation?

a)

Adenine

b)

a change/mistake in DNA

c)

a copy of the original DNA

d)

Guanine

9.

What causes mutations?

a)

the environment

b)

random assortment

c)

chemicals

d)

independent assortment

10.

This is an example of -

THE DOG HID THE TOY (ORIGINAL)

THE DOH IDT HET OY? (NEW)

a)

addition

b)

substitution

c)

deletion

11.

This is an example of -

THE DOG HID THE TOY (ORIGINAL)

THE DOG SHI DTH ETO Y??

a)

addition

b)

deletion

c)

substitution

12.

This is an example of -

THE DOG HID THE TOY (ORIGINAL)

THE DOG HIM THE TOY (NEW)

a)

addition

b)

deletion

c)

substitution

13.

Frameshift mutations result from -

a)

additions

b)

substitutions

c)

deletions

d)

all of these

14.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
15.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
16.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
17.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
18.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
19.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
20.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
21.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
22.
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%
23.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

24.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

25.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

26.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
27.
If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.
a)
incomplete dominance
b)
codominance
c)
codependant
d)
cooperative
28.

B=Brown fur

b=tan fur

What percent of the offspring would be tan when you cross BbxBb?

a)

75%

b)

25%

c)

50%

d)

100%

29.

In a pedigree, squares represent _______

a)

males

b)

females

30.

In a pedigree, circles represent _____

a)

males

b)

females

31.

Assuming a trait is AUTOSOMAL DOMINANT, what genotypes could make a person AFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

32.

Assuming a trait is AUTOSOMAL DOMINANT, what genotype would make a person UNAFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

33.

Assuming a trait is AUTOSOMAL RECESSIVE, what genotype would make a person AFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

34.

Assuming a trait is AUTOSOMAL RECESSIVE, what genotypes would make a person UNAFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

35.

Assuming a trait is AUTOSOMAL DOMINANT, a person with the genotype "Aa" would be

a)

affected

b)

unaffected

36.

Assuming a trait is AUTOSOMAL RECESSIVE, a person with the genotype "Aa" would be

a)

affected

b)

unaffected

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