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Genetics Review

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.
What is DNA?
a)
nucleotides
b)
A+T, C+G
c)
instructions for the cell
d)
all are correct
2.
Genes are found on...
a)
Chromosomes
b)
Proteins
c)
Genes
d)
Nucleotides
3.
Through heredity, _____ are passed on from parents to children.
a)
Traits
b)
Genes
c)
Chromosomes
d)
All would apply.
4.
Which is an example of an phenotype?
a)
straight teeth
b)
genes
c)
chromosomes
d)
Tt
5.
Which is an example of a genotype?
a)
Dd
b)
genes
c)
Chromosomes
d)
Having flat feet
6.
If you have two of the SAME alleles for each trait, you are...
a)
homozygous
b)
heterozygous
c)
Hh
d)
none are correct
7.
If you have two DIFFERENT alleles for each trait, you are...
a)
homozygous
b)
heterozygous
c)
HH
d)
none of the above
8.
If you have one dominant allele (straight teeth = T) and one recessive allele
(crooked teeth = t), what would you look like?
a)
Straight teeth
b)
Crooked teeth
c)
No enough info
9.
Which of these is homozygous?
a)
Nn
b)
NN
c)
Mm
10.
Which of these is homozygous?
a)
Ss
b)
ss
c)
Tt
11.
Which of these is heterozygous?
a)
Gg
b)
Tt
c)
Bb
d)
All of them!
12.
What is an allele?
a)
Form of a gene.
b)
Section of DNA
c)
Instructions for the body.
13.
What happens when you have an dominant and recessive alleles together?
a)
Recessive masks dominant.
b)
Dominant masks recessive.
c)
They blend together.
d)
You can't have them together.
14.
Check the word that best describes a genotype.
a)
genetic alleles
b)
physical traits
c)
hair color
d)
skin color
15.
Check the word that best describes a phenotype.
a)
Having freckles.
b)
Genes
c)
Hh
d)
hh
16.
You have purple and white flowers.  You cross/breed a purple plant with a purple plant.  You DON'T know the genetics of a plant.  Can you get a white plant offspring?
a)
True
b)
False
17.
Dominant genes are more common than recessive ones.
a)
True
b)
False
18.
Do plants and animals have DNA?
a)
Yes
b)
No
c)
Some
19.
Recessive genes are more common than dominant ones.
a)
True
b)
False
20.
Sections of DNA makes up....
a)
phenotype
b)
Genes
c)
Proteins
d)
Nucleotides
21.

What is the genotype of the parent on the top?

a)

yy

b)

Yy

c)

green

d)

yellow

22.

What is the genotype of the parent on the side?

a)

yy

b)

Yy

c)

green

d)

yellow

23.

What is the phenotype of the parent on the side?

a)

yy

b)

Yy

c)

green

d)

yellow

24.

What is the phenotype of the parent on the top?

a)

yy

b)

Yy

c)

green

d)

yellow

25.

Which phenotype is dominant?

a)

yy

b)

Yy

c)

green

d)

yellow

26.

Which phenotype is recessive?

a)

yy

b)

Yy

c)

green

d)

yellow

27.

What is the probability of getting a yellow pea offspring?

a)

25%

b)

50%

c)

75%

d)

100%

28.

What is the probability of getting a green pea offspring?

a)

25%

b)

50%

c)

75%

d)

100%

29.

What are the mother's alleles?

a)

Bb

b)

B and B

c)

B and b

d)

bb

30.

What is the genotype of the father?

a)

Bb

b)

BB

c)

bb

d)

brown

31.

What is the phenotype of the father?

a)

Bb

b)

green

c)

bb

d)

brown

32.

What is the probability of being green eyed?

a)

25%

b)

50%

c)

75%

d)

100%

33.

What is the probability of being brown eyed?

a)

25%

b)

50%

c)

75%

d)

100%

34.

What is the probability of being heterozygous?

a)

25%

b)

50%

c)

75%

d)

100%

35.

What is the probability of being homozygous?

a)

25%

b)

50%

c)

75%

d)

100%

36.

What is the probability of being homozygous dominant?

a)

25%

b)

50%

c)

75%

d)

100%

37.

What is the probability of being homozygous recessive?

a)

25%

b)

50%

c)

75%

d)

100%

38.

Is Huntington's disease dominant or recessive?

a)

dominant

b)

recessive

c)

can't tell

39.

How many males are affected?

a)

4

b)

2

c)

10

d)

5

40.

What are the possible genotypes for people that inherited huntington's disease? *Even if they are not necessarily listed.

a)

HH, Hh

b)

HH, hh

c)

HH

d)

Hh

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