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Nonmendelian Genetics Practice quiz

Total questions: 36

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
Which type of inheritance causes both traits to be expressed equally in the heterozygote?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
2.

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

3.

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

4.

Radish color is incomplete dominant, red and white are pure breeding colors. While heterozygous are purple.


Cros a red radish with a white.

a)

4 purple

b)

1 red, 2 purple, 1 white

c)

2 red, 2 white

d)

1 red, 1 purple, 2 white

5.

Radish color is incompletely dominant, red and white are pure breeding colors. While heterozygous are purple.


Cros a red radish with a purple.

a)

4 purple

b)

1 red, 2 purple, 1 white

c)

2 red, 2 purple

d)

1 red, 1 purple, 2 white

6.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
Mendelian dominance
d)
complete dominance
7.
Incomplete dominance or co-dominance?
A calico cat shows both the traits for orange fur and black fur. 
a)
Incomplete Dominance
b)
Co-dominance
c)
Complete dominance
d)
Mendelian dominance
8.

In humans, there are three phenotypes for hair--curly, wavy, and straight? Hair texture shows incomplete dominance. Suppose two people with wavy hair have a child. What is the probability the child will have straight hair?

a)

100%

b)

0%

c)

25%

d)

50%

9.
In some carnations, flower color exhibits codominance.  Identify the correct genotypes for red, white, and speckled carnations.
a)
Red = RR, white = rr, speckled = Rr
b)
Red = RR, white = WW, speckled = rw
c)
Red = RR, white = ww, Speckled = Rw
d)
Red = RR, white = WW, speckled = RW
10.
The sex of a child is determined by
a)
whether the father's sperm contains an x or y chromosome
b)
whether the mother's egg contains an x or y chromosome
c)
the age of the parents
11.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
12.

Which chromosome contains more genes?

a)

The X chromosome

b)

The Y chromosome

c)

They are homologous, so they contain the same amount of genes.

13.
When we say that a woman is a carrier for a genetic disease or disorder it means that
a)
she has 1 gene, but not the disorder
b)
she has 2 genes for the disorder
c)
she can pass the gene only to male children
d)
she can pass the gene only to female children
14.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
15.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
16.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
17.
What is NOT a possible genotype for someone with type B blood?
a)
BB
b)
AB
c)
BO
18.
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
19.
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)
BO
b)
BB
c)
OO
d)
type B
20.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
21.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
22.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
23.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
24.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
25.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
26.
How are individuals I-2 and III-5 related?
a)
Grandpa and grandson
b)
Mom and son
c)
Uncle and nephew
d)
Grandma and grandson
27.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
28.

How many males are color-blind in this family?

a)

2

b)

3

c)

4

d)

5

29.

What is the mode of inheritance shown here?

a)

Sex Linked Recessive

b)

Autosomal Dominant

c)

Autosomal Recessive

d)

Sex Linked Dominant

30.
What is the mode of inheritance shown here?
a)
Autosomal Recessive
b)
Autosomal Dominant
c)
Sex Linked Recessive
d)
Sex Linked Dominant
31.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked Recessive
d)
Sex Linked Dominant
32.

What is the mode of inheritance shown here?

a)

Autosomal Dominant

b)

Sex Linked Dominant

c)

Autosomal Recessive

d)

Sex Linked Recessive

33.
Why do all the daughters in Generation II carry the colorblind gene?
a)
Because mom passed on the gene.
b)
Because dad passed on the X chromosome.
c)
Because their brother has it.
d)
Because their brother gave it to them.
34.

What is the mode of inheritance shown here?

a)

Autosomal Recessive

b)

Autosomal Dominant

c)

Sex Linked Recessive

d)

Sex Linked Dominant

35.

Which is a true statement about sex-linked dominant inheritance?

a)

Affected females are much more common than affected males

b)

ALL daughters of an affected male will be affected.

c)

It does not skip generations.

d)

All of the above.

36.

Which is a true statement about sex-linked recessive inheritance?

a)

Affected males are much more common than affected females

b)

ALL daughters of an affected male will be affected.

c)

It does not skip generations.

d)

Males can pass the trait on to their sons.

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