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Incomplete dominance, Codominance, & Multiple Alleles

Total questions: 31

Worksheet time: 52mins

Name
Class
Date
1.
How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?
a)
There is no difference
b)
The heterozygous genotype has a unique phenotype
c)
There is no heterozygous genotype
d)
There is only one phenotype regardless of genotype.
2.
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
3.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
4.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
5.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
6.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
7.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
8.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
9.
If you cross a black chicken with a white chicken, only checkered chickens would be produced.  What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
10.

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

11.

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

12.

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

13.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
14.

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%

15.

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

16.

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

17.
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
a)
100 %
b)
75%
c)
50%
d)
25%
18.
Jim has type AB blood. His dad could be type O.
a)
True
b)
False
19.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
20.
If one parent is heterozygous for type A blood and the other parent is homozygous for type B blood, what is the probability they could have a child with type B blood?
a)
0%
b)
25%
c)
50%
d)
100%
21.
What is the genotype of a person who is heterozygous for type B blood?
a)
IBIB
b)
IBi
c)
IAIB
d)
IAi
22.

___________are different forms of the same gene that are always found on the same position of two homologous chromosomes.

a)

alleles

b)

chromatids

c)

phenotypes

d)

genotypes

23.

What is a phenotype?

a)

alternative form of a gene

b)

the physical characteristics of a trait

c)

specific set of genes for a trait

d)

the study of biological inheritance

24.

If one of your parents is blood type A and the other is type B, which of the following blood types could you be?

a)

O

b)

AB

c)

A or B

d)

Any of these

25.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
26.

A woman has type B blood and her husband has type O blood. What must be the woman's genotype, if they have a child with type O blood?

a)

IB i

b)

IB IB

c)

ii

d)

type B blood

27.

If a person has type B blood, the phenotype is B. What can the genotype be?

a)

IBIB or IBi

b)

IAIA or IAi

c)

IAIB

d)

ii

28.

If a person has type AB blood, the phenotype is AB. What can the genotype be?

a)

IBIB or IBi

b)

IAIA or IAi

c)

IAIB

d)

ii

29.

if the father is type A and the mother is type B, in order for baby Sylvester to have the genotype ii, his parents must be?

a)

heterozygous

b)

homozygous

30.

Which term(s) best describes the inheritance of human blood types?

a)

incomplete dominance and multiple alleles

b)

codominance and epistasis

c)

codominance and multiple alleles

d)

incomplete dominance and codominance

31.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present

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