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Incomplete Dominance and Codominance

Total questions: 40

Worksheet time: 10hrs 0mins

Name
Class
Date
1.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
2.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
3.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

4.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

5.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross two speckled flowers.

a)

1 red, 2 speckled, 1 blue

b)

2 red, 2 blue

c)

2 blue, 2 speckled

d)

1 red, 1 speckled, 2 blue

6.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a blue flower.

a)

1 red, 2 speckled, 1 blue

b)

2 red, 2 blue

c)

4 speckled

d)

1 red, 1 speckled, 2 blue

7.

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.


What is the genotype for a brown mouse?

a)

BB

b)

Bb

c)

bb

8.

In cattle red coats are represented as RR, and white coats are represented as WW.


What is the genotype for Roan color?

a)

RR

b)

RW

c)

WW

9.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
10.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
11.
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
12.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
13.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
14.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
15.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
16.
In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between 2 speckled flowers and find the genotype ratio.
a)
0 RR: 4 RW: 0 WW
b)
2 RR: 2 RW: 0 WW
c)
1 RR: 2 RW: 1 WW
d)
0 RR: 2 RW: 2 WW
17.
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%
18.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
19.

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

20.

The blending of two traits is known as ---

a)

incomplete dominance

b)

codominance

21.

This type of inheritance pattern is a MIXTURE of two traits. This is known as ---

a)

incomplete dominance.

b)

codominance

22.

A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---

a)

Codominance

b)

Incomplete dominance

23.

What type of inheritance do two alleles have if their traits blend together?

a)

Incomplete dominance

b)

Codominance

24.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

25.

If you cross a black chicken with a white chicken, only black and white checkered chickens would be produced. What kind of inheritance pattern does this follow?

a)

Incomplete dominance

b)

Codominance

26.

What does this Punnett square and the probabilities of the ofspring represent?

a)

incomplete dominance

b)

codominance

27.

The hair form gene shows incomplete dominance. Straight hair (SS) is dominant, curly hair (CC) is recessive, and wavy hair (SC) is heterozygous. Mr. and Mrs. Anderson both have wavy hair (SC). What percentage of their children will also have wavy hair (SC)?

a)

25%

b)

50%

c)

75%

d)

100%

28.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring will be calico (black and tan spotted)?

a)

25

b)

50

c)

75

d)

100

29.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

a)

25

b)

50

c)

75

d)

100

30.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be white?

a)

25

b)

50

c)

0

d)

100

31.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be gray?

a)

25

b)

50

c)

75

d)

100

32.

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

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

33.

A black male and white female produced this grey offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

34.

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

35.

A pink flower and a white flower produced this offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

36.

A pink flower and a white flower produced this offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

37.

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

38.

Which of the following is NOT true of dominant genes?

a)

Dominant genes are always expressed wherever they are present.

b)

A dominant gene will overpower all other genes to be the only one expressed.

c)

Two dominant genes can be expressed together in a situation of co-dominance.

d)

None of the above.

39.

"The offspring's phenotype is an intermediate (blended) phenotype of the two parental phenotypes"

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

40.

"The offspring's phenotype has independent and equal expression of both parental phenotypes"

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance