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Incomplete Dominance and Codominance

Total questions: 20

Worksheet time: 17mins

Name
Class
Date
1.

The different forms of a gene are called ---

a)

traits

b)

hybrids

c)

alleles

2.

The blending of two traits in which one is not completely dominant over the other is known as ---

a)

incomplete dominance

b)

codominance

3.

____ is an inheritance pattern that results in offspring that are a MIXTURE of the two traits of its parents, like yellow and blue flowers making green offspring.

a)

incomplete dominance.

b)

codominance

4.

An inheritance pattern in which both alleles for a gene are expressed in the offspring so that both traits show up on its body is known as ---

a)

Codominance

b)

Incomplete dominance

5.

What type of inheritance pattern do two alleles for a gene follow if their traits blend together on the offspring?

a)

Incomplete dominance

b)

Codominance

6.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

7.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

a)

Incomplete dominance

b)

Codominance

8.

If you cross a black chicken with a white chicken and only black AND white feathered chickens are produced, then feather color follows the inheritance pattern of ---

a)

Incomplete dominance

b)

Codominance

9.

The green fish offspring in this image is an example of ---

a)

Incomplete dominance

b)

Codominance

10.

This cow with brown and white spots is an example of ---

a)

Incomplete dominance

b)

Codominance

11.

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

a)

Red and white spotted

b)

Red

c)

Pink

d)

White

12.

A red flowered plant (RR) is crossed 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%

13.

A tall plant (TT) is crossed with a short plant (SS). The result is a medium plant (TS). This is what type of inheritance pattern?

a)

Incomplete dominance

b)

Codominance

14.

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have red (RR) flowers?

a)

0%

b)

25%

c)

50%

d)

100%

15.

The hair form gene shows incomplete dominance. If your genotype is SS, you will have straight hair. If your genotype is CC, you will have curly hair. If your genotype is SC, you will have wavy hair. 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%

16.

What do the phenotypes of the offspring in this Punnett square represent?

a)

incomplete dominance

b)

codominance

17.

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

a)

25%

b)

50%

c)

75%

d)

100%

18.

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

19.

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

20.

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