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Worksheets

Genetics

Total questions: 30

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Define allele
a)
genetic code
b)
protein
c)
different versions of a gene
d)
codes for protein
2.
Define gene:
a)
pair of pants
b)
DNA
c)
segment of DNA that codes for proteins
d)
all of the above
3.
define homologous chromosomes:
a)
two similar alleles
b)
genes
c)
chromosomes similar in size, shape and DNA
d)
dominant allele
4.
Which matches genotype?
a)
single allele that codes for phenotype
b)
genetic code
c)
two alleles that code for phenotype
d)
recessive
5.
Define phenotype
a)
physical characteristic based on genotype
b)
two alleles that code for a trait
c)
DD
d)
dd
6.
What is a trait?
a)
physical characteristic
b)
homozygous dominant 
c)
heterozygous 
d)
genotype
7.
A capital letter, D, represents a recessive allele
a)
true
b)
false
8.
a lower case letter, d, represents a recessive allele
a)
true
b)
false
9.
Which of the following is an example of a homozygous dominant individual?
a)
DD
b)
Dd
c)
dd
d)
all of the above
10.
Which of the following is an example of a homozygous recessive individual?
a)
DD
b)
dd
c)
Dd
d)
all of the above
11.
Which is a heterozygous individual?
a)
DD
b)
dd
c)
Dd
d)
all of the above
12.
Which matches hybrid?
a)
homozygous 
b)
heterozygous 
c)
purebred 
d)
recessive 
13.
Which matches purebred?
a)
homozygous 
b)
heterzygous
c)
hybrid
d)
dominant
14.

A homozygous dominant red flower and a heterozygous red flower cross. (white = recessive) What is the parent cross?

a)

RR x rr

b)

RR x Rr

c)

rr x Rr

d)

Rr x Rr

15.
A homozygous dominant red flower and a heterozygous red flower cross. (white = recessive) What are the possible phenotypes of the offspring?
a)
all red
b)
1/2 red and 1/2 white
c)
all white
16.

A homozygous dominant red flower and a heterozygous red flower cross (white = recessive). Find the correct allele for homozygous dominant

a)

RR

b)

Rr

c)

rr

17.

A homozygous dominant red flower and a heterozygous red flower cross. (white = recessive) Find the correct genotype for heterozygous red

a)

Rr

b)

RR

c)

rr

d)

red

18.

A homozygous dominant red flower and a heterozygous red flower cross. (white = recessive). Which offspring CAN'T be made?

a)

red

b)

white

19.

What does a Punnett Square show outside the boxes? (left image)

a)

parent genotypes

b)

offspring genotypes

c)

parent phenotype

d)

offspring phenotype

20.

What does a Punnett Square show inside the boxes? (left image)

a)

parent genotypes

b)

offspring genotypes

c)

parent phenotype

d)

offspring phenotype

21.

R = Blue r = white. A blue bird and white bird mate and have all pale blue babies. What inheritance pattern?

a)

complete

b)

incomplete

c)

codominance

d)

sex-linked

22.

B = Blue b = white A blue lizard (BB) and white lizard (bb) mate and have all blue babies. What inheritance pattern?

a)

complete

b)

incomplete

c)

codominance

d)

sex-linked

23.

B = Blue b = white A blue lizard (BB) and white lizard (bb) mate and have all blue baby lizards with white spots in a polka dot fashion. What inheritance pattern?

a)

complete

b)

incomplete

c)

codominance

d)

sex-linked

24.

Hemophilia is a sex-linked recessive disorder. What is the genotype of an affected (has disease) mom?

a)

rr

b)

XR Xr

c)

Xr Xr

d)

XR Y

25.

Hemophilia is a sex-linked recessive disorder. What is the genotype of an affected dad?

a)

rr

b)

XR Xr

c)

Xr Xr

d)

Xr Y

26.

height is a trait that is influenced by the

a)

environment only

b)

genetics only

c)

both genetics and environment

27.

blood type is a trait that is influenced by the

a)

environment only

b)

genetics only

c)

both genetics and environment

28.

getting a tattoo is influenced by the

a)

environment only

b)

genetics only

c)

both genetics and environment

29.

When several different genes influence a single trait, such as height, it is called

a)

codominance

b)

multiple alleles

c)

polygenic

30.

having freckles is influenced by the

a)

environment only

b)

genetics only

c)

both genetics and environment